CVE-2018-14773

HIGHNVD 6.57.8
EchelonGraph scoreHIGH confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score elevated to 7.8 because EPSS predicted 58% probability of exploitation within the next 30 days (99th percentile of EPSS-scored CVEs) when EchelonGraph scored this CVE. NVD baseline CVSS 6.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction (continuous uplift above 30%)
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated

Also known asEUVD-2022-3252 (ENISA EUVD) · GHSA-8wgj-6wx8-h5hq (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • 3 internet-facing services (distinct ip:port) on record running an affected version — derived from Shodan data (© Shodan); a patched service can stay counted while its port stays open
  • High exploitation likelihood — EPSS 58%
CISA-KEV: Not listedEPSS PROB: 58%CVSS: 6.5Exploit: No code on recordExposed services: 3

A fix is available — apply it.

An issue was discovered in Http Foundation in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. It arises from support for a (legacy) IIS header that lets users override the path in the request URL via the X-Original-URL or X-Rewrite-URL HTTP request header. These headers are designed for IIS support, but it's not verified that the server is in fact running IIS, which means anybody who can send these requests to an application can trigger this. This affects \Symfony\Component\HttpFoundation\Request::prepareRequestUri() where X-Original-URL and X_REWRITE_URL are both used. The fix drops support for these methods so that they cannot be used as attack vectors such as web cache poisoning.

Internet exposure · derived from Shodan data

3 internet-facing services (distinct ip:port) on record running a version that maps to CVE-2018-14773, in our KEV-Exposure radar’s Shodan-derived sample.

across 3 hosting countries (Germany, Thailand, United States)top: drupal
See the KEV-Exposure radar →Derived from Shodan data. Shodan data is owned by Shodan, which holds its copyright (© Shodan). EchelonGraph claims no ownership of it or copyright in it. Aggregate, host-redacted.

How it counts: every 12 hours, when Shodan query credits allow, the radar runs one Shodan query per tracked product, reads up to 100 ip:port services per query, and keeps a service when its banner version matches a CISA-KEV or high-EPSS CVE; a service is dropped when neither a search nor a Shodan InternetDB port re-check has refreshed it for 21 days. A re-check that finds the port still listed by Shodan InternetDB refreshes the service without re-reading the banner, so a patched service can stay counted while its port stays open. A count is a banner-version inference over a sample, not an exploit test and not an internet-wide census, and the unit is a service, not a machine: a machine answering on two ports counts twice.

CVSS v3
6.5
EG Score
7.8HIGHhigh confidence
EG Risk
52
EG Risk 52/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation58% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
58%
EPSS %ILE
99th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is EPSS's lift toward 9.0 from its impact severity (EG Severity, CVSS 6.5 MEDIUM): a likelihood of exploitation, not impact.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
58% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-08). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 3, 2018

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Nov 1, 2026
Patch available. Sources: github_commit.
Web page

PSIRT.COM — Product Security Incident Response Team

http://www.securityfocus.com/bid/104943
Web page

Drupal Core - 3rd-party libraries -SA-CORE-2018-005 | Drupal.org

https://www.drupal.org/SA-CORE-2018-005
Web page

CVE-2018-14773: Remove support for legacy and risky HTTP headers (Symfony Blog)

https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers
Web page

Bugtraq: [SECURITY] [DSA 4441-1] symfony security update

https://seclists.org/bugtraq/2019/May/21
Web pageMentions a patch (unverified)

[SECURITY] [DLA 1707-1] symfony security update

https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
GitHub commit

commit e447e8b92148 (symfony/symfony)

Fix landed in symfony/symfony commit e447e8b92148 — awaiting tagged release

https://github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b

Vendor Advisories for CVE-2018-14773(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
composersymfony/http-foundation @ 2.7.49 (fixes >= 2.7.0, < 2.7.49)—ghsa
composersymfony/http-foundation @ 2.8.44 (fixes >= 2.8.0, < 2.8.44)—ghsa
composersymfony/http-foundation @ 3.3.18 (fixes >= 3.0.0, < 3.3.18)—ghsa
composersymfony/http-foundation @ 3.4.14 (fixes >= 3.4.0, < 3.4.14)—ghsa
composersymfony/http-foundation @ 4.0.14 (fixes >= 4.0.0, < 4.0.14)—ghsa
composersymfony/http-foundation @ 4.1.3 (fixes >= 4.1.0, < 4.1.3)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(8 across 7 ecosystems)
Packagist(2)
PackageVulnerable rangeFix by version rangeDependents
symfony/http-foundationv4.1.0, v4.1.1, v4.1.2
  • 2.7.0 up to 2.7.49: fixed in 2.7.49
  • 2.8.0 up to 2.8.44: fixed in 2.8.44
  • 3.0.0 up to 3.3.18: fixed in 3.3.18
  • 3.4.0 up to 3.4.14: fixed in 3.4.14
  • 4.0.0 up to 4.0.14: fixed in 4.0.14
  • 4.1.0 up to 4.1.3: fixed in 4.1.3
—
symfony/symfonyv4.1.0, v4.1.1, v4.1.2
  • 2.7.0 up to 2.7.49: fixed in 2.7.49
  • 2.8.0 up to 2.8.44: fixed in 2.8.44
  • 3.0.0 up to 3.3.18: fixed in 3.3.18
  • 3.4.0 up to 3.4.14: fixed in 3.4.14
  • 4.0.0 up to 4.0.14: fixed in 4.0.14
  • 4.1.0 up to 4.1.3: fixed in 4.1.3
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
symfony—
  • every version up to 3.4.14+dfsg-1: fixed in 3.4.14+dfsg-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
symfony—
  • every version up to 3.4.14+dfsg-1: fixed in 3.4.14+dfsg-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
symfony—
  • every version up to 3.4.14+dfsg-1: fixed in 3.4.14+dfsg-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
symfony—
  • every version up to 3.4.14+dfsg-1: fixed in 3.4.14+dfsg-1
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
symfony2.3.21+dfsg-4, 2.3.21+dfsg-4+deb8u1, 2.3.21+dfsg-4+deb8u2, 2.3.21+dfsg-4+deb8u3
  • every version up to 2.3.21+dfsg-4+deb8u4: fixed in 2.3.21+dfsg-4+deb8u4
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
symfony2.8.7+dfsg-1.3, 2.8.7+dfsg-1.3+deb9u1
  • every version up to 2.8.7+dfsg-1.3+deb9u2: fixed in 2.8.7+dfsg-1.3+deb9u2
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 28× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 176 rows on record for this CVE, as 97 entries (3 repeats merged).

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 3 repeat rows among the latest 100 are merged into the row they repeat. The 76 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:28 UTCEPSS rescoreEPSS 58% · 99th percentile
  2. 2026-11-11 16:29 UTCEPSS rescoreEPSS 58% · 99th percentile
  3. 2026-11-10 16:32 UTCEPSS rescoreEPSS 58% · 99th percentile
  4. 2026-11-10 14:26 UTCOSV refresh
  5. 2026-11-09 14:05 UTCEchelonGraph re-scored
  6. 2026-11-09 14:05 UTCGHSA enrichmentGHSA-8wgj-6wx8-h5hq · GitHub severity MODERATE · GitHub CVSS 6.5
  7. 2026-11-07 16:31 UTCEPSS rescoreEPSS 58% · 99th percentile
  8. 2026-11-05 16:28 UTCEPSS rescoreEPSS 58% · 99th percentile
  9. 2026-11-04 16:28 UTCEPSS rescoreEPSS 58% · 99th percentile
  10. 2026-11-01 22:16 UTCEchelonGraph re-scored
  11. 2026-11-01 22:16 UTCGHSA enrichmentGHSA-8wgj-6wx8-h5hq · GitHub severity MODERATE · GitHub CVSS 6.5
  12. 2026-11-01 16:28 UTCEPSS rescoreEPSS 58% · 99th percentile
  13. 2026-11-01 08:43 UTCGHSA enrichmentGHSA-8wgj-6wx8-h5hq · GitHub severity MODERATE · GitHub CVSS 6.5
  14. 2026-11-01 08:43 UTCEchelonGraph re-scored
  15. 2026-10-31 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  16. 2026-10-30 16:28 UTCEPSS rescoreEPSS 58% · 99th percentile
  17. 2026-10-29 16:28 UTCEPSS rescoreEPSS 58% · 99th percentile
  18. 2026-10-28 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  19. 2026-10-27 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  20. 2026-10-26 16:26 UTCEPSS rescoreEPSS 58% · 99th percentile
  21. 2026-10-25 19:24 UTCEchelonGraph re-scored
  22. 2026-10-25 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  23. 2026-10-25 06:19 UTCEchelonGraph re-scored
  24. 2026-10-24 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  25. 2026-10-23 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
Show 72 more
  1. 2026-10-22 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  2. 2026-10-22 03:55 UTCOSV refresh
  3. 2026-10-21 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  4. 2026-10-19 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  5. 2026-10-18 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  6. 2026-10-18 10:19 UTCEchelonGraph re-scored
  7. 2026-10-16 16:30 UTCEPSS rescoreEPSS 58% · 99th percentile
  8. 2026-10-15 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  9. 2026-10-14 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  10. 2026-10-13 16:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  11. 2026-10-12 20:17 UTCEchelonGraph re-scored
  12. 2026-10-12 16:28 UTCEPSS rescoreEPSS 58% · 99th percentile
  13. 2026-10-12 00:41 UTCEchelonGraph re-scored
  14. 2026-10-11 13:41 UTCEPSS rescoreEPSS 58% · 99th percentile
  15. 2026-10-10 19:55 UTCEPSS rescoreEPSS 58% · 99th percentile
  16. 2026-10-09 20:02 UTCEPSS rescoreEPSS 58% · 99th percentile
  17. 2026-10-08 16:36 UTCEPSS rescoreEPSS 58% · 99th percentile
  18. 2026-10-07 23:41 UTCEPSS rescoreEPSS 58% · 99th percentile
  19. 2026-10-06 15:12 UTCEPSS rescoreEPSS 58% · 99th percentile
  20. 2026-10-03 14:21 UTCEPSS rescoreEPSS 58% · 99th percentile
  21. 2026-09-30 14:59 UTCEPSS rescoreEPSS 58% · 99th percentile
  22. 2026-09-30 09:54 UTCEchelonGraph re-scored
  23. 2026-09-28 21:22 UTCOSV refresh
  24. 2026-09-28 13:45 UTCEPSS rescoreEPSS 58% · 99th percentile
  25. 2026-09-26 15:53 UTCEPSS rescoreEPSS 58% · 99th percentile
  26. 2026-09-24 13:59 UTCEPSS rescoreEPSS 58% · 99th percentile
  27. 2026-09-23 13:42 UTCEPSS rescoreEPSS 58% · 99th percentile
  28. 2026-09-21 20:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  29. 2026-09-19 15:36 UTCEPSS rescoreEPSS 58% · 99th percentile
  30. 2026-09-18 19:22 UTCEPSS rescoreEPSS 58% · 99th percentile
  31. 2026-09-17 19:22 UTCEPSS rescoreEPSS 58% · 99th percentile
  32. 2026-09-16 14:03 UTCEPSS rescoreEPSS 58% · 99th percentile
  33. 2026-09-16 05:06 UTCEPSS rescoreEPSS 58% · 99th percentile
  34. 2026-09-15 03:05 UTCEPSS rescoreEPSS 58% · 99th percentile
  35. 2026-09-12 14:56 UTCEPSS rescoreEPSS 58% · 99th percentile
  36. 2026-09-11 14:47 UTCEPSS rescoreEPSS 58% · 99th percentile
  37. 2026-09-10 09:27 UTCEPSS rescoreEPSS 58% · 99th percentile
  38. 2026-09-09 02:14 UTCOSV refresh
  39. 2026-09-06 13:43 UTCEPSS rescoreEPSS 58% · 99th percentile
  40. 2026-09-05 15:24 UTCEPSS rescoreEPSS 58% · 99th percentile
  41. 2026-09-04 13:56 UTCEPSS rescoreEPSS 58% · 99th percentile
  42. 2026-09-02 14:07 UTCEPSS rescoreEPSS 58% · 99th percentile
  43. 2026-09-01 03:31 UTCEPSS rescoreEPSS 58% · 99th percentile
  44. 2026-08-30 19:13 UTCEPSS rescoreEPSS 58% · 99th percentile
  45. 2026-08-28 21:36 UTCEPSS rescoreEPSS 58% · 99th percentile
  46. 2026-08-27 14:21 UTCEPSS rescoreEPSS 58% · 99th percentile
  47. 2026-08-26 14:41 UTCEPSS rescoreEPSS 58% · 99th percentile
  48. 2026-08-25 13:44 UTCEPSS rescoreEPSS 58% · 99th percentile
  49. 2026-08-23 00:14 UTCEPSS rescoreEPSS 58% · 99th percentile
  50. 2026-08-22 11:37 UTCOSV refresh
  51. 2026-08-21 23:44 UTCEPSS rescoreEPSS 58% · 99th percentile
  52. 2026-08-20 22:51 UTCEPSS rescoreEPSS 58% · 99th percentile
  53. 2026-08-19 17:00 UTCEPSS rescoreEPSS 58% · 99th percentile
  54. 2026-08-18 13:43 UTCEPSS rescoreEPSS 58% · 99th percentile
  55. 2026-08-17 13:42 UTCEPSS rescoreEPSS 58% · 99th percentile
  56. 2026-08-16 02:10 UTCEPSS rescoreEPSS 58% · 99th percentile
  57. 2026-08-15 01:26 UTCEPSS rescoreEPSS 58% · 99th percentile
  58. 2026-08-13 21:56 UTCEPSS rescoreEPSS 58% · 99th percentile
  59. 2026-08-12 13:46 UTCEPSS rescoreEPSS 58% · 99th percentile
  60. 2026-08-11 13:36 UTCEPSS rescoreEPSS 58% · 99th percentile
  61. 2026-08-08 16:32 UTCEPSS rescoreEPSS 58% · 99th percentile
  62. 2026-08-07 16:22 UTCEPSS rescoreEPSS 58% · 98th percentile
  63. 2026-08-06 14:15 UTCOSV refresh
  64. 2026-08-01 04:12 UTCEPSS rescoreEPSS 58% · 98th percentile
  65. 2026-07-30 01:27 UTCEPSS rescoreEPSS 58% · 98th percentile
  66. 2026-07-28 15:32 UTCEPSS rescoreEPSS 58% · 98th percentile
  67. 2026-07-26 14:51 UTCEPSS rescoreEPSS 58% · 98th percentile
  68. 2026-07-24 14:14 UTCEPSS rescoreEPSS 58% · 98th percentile
  69. 2026-07-23 14:15 UTCEPSS rescoreEPSS 58% · 98th percentile
  70. 2026-07-23 01:33 UTCEchelonGraph re-scored▲ 1.30
  71. 2026-07-22 22:13 UTCEchelonGraph re-scored
  72. 2026-07-22 14:04 UTCEPSS rescoreEPSS 58% · 98th percentile

Frequently asked(5)

What is CVE-2018-14773?
CVE-2018-14773 is a high-severity vulnerability; its CVE record was published on August 3, 2018. An issue was discovered in Http Foundation in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. It arises from support for a (legacy) IIS header that lets users override the path in the request URL via the…
When was CVE-2018-14773 made public?
CVE-2018-14773 was made public on August 1, 2018: that is the date its CVE record's CNA, MITRE Corporation, gives for when the vulnerability was made public. The CVE record itself was published on August 3, 2018. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2018-14773 actively exploited?
CVE-2018-14773 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 58% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2018-14773?
CVE-2018-14773 has a CVSS v3 base score of 6.5 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 7.8 (HIGH).
How do I remediate CVE-2018-14773?
A fix for CVE-2018-14773 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2018-14773 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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