CVE-2018-11784

CRITICALNVD 4.39.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 94% probability of exploitation within the next 30 days (top 0.2% of all CVEs). NVD baseline CVSS 4.3 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, nvd
Trending — 4 sources updated this weekElevated
9.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • 90 internet-exposed hosts are running an affected version right now
  • High exploitation likelihood — EPSS 94%
CISA-KEV: Not listedEPSS PROB: 94%CVSS: 4.3Exploit: Elevated riskExposed: 90

A fix is available — apply it.

When the default servlet in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33 and 7.0.23 to 7.0.90 returned a redirect to a directory (e.g. redirecting to '/foo/' when the user requested '/foo') a specially crafted URL could be used to cause the redirect to be generated to any URI of the attackers choice.

Live · internet exposure

90 internet-exposed hosts are running an affected version of CVE-2018-11784 right now.

across 27 countries (United States, China, Korea, Republic of, Germany, Singapore)top: tomcat
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
4.3
EG Score
9.0(high)
EG Risk
83(Track)
EG Risk 83/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation94% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
94%
EPSS %ILE
100%
KEV
Not listed

Published

October 4, 2018

Last Modified

November 21, 2024

References (78)

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntutomcat8-user (8.0.32-1ubuntu1.8) @ xenial2026-05-28ubuntu
redhatpki-deps:10.6-8000020190524054914.55190bc52019-06-18redhat
redhattomcat-0:7.0.76-9.el7_62019-03-13redhat
redhattomcat2019-01-22redhat
redhattomcat-native-0:1.2.17-18.redhat_18.ep7.el72019-01-22redhat
redhatjws5-tomcat-0:9.0.7-12.redhat_12.1.el7jws2018-10-03redhat
redhatpatch2018-10-03redhat

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

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.apache.tomcat.embed:tomcat-embed-core9.0.1 ... 9.0.8 (9 versions)9.0.12—

Weakness Classification(1)

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

All Vendor Advisories

(7)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 14× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:32 UTCEG score recompute
  4. 2026-07-22 21:29 UTCEG score recompute▲ 4.70
  5. 2026-07-22 21:29 UTCVendor advisory
  6. 2026-07-21 04:47 UTCOSV refresh
  7. 2026-07-19 02:26 UTCEPSS rescore
  8. 2026-07-19 02:26 UTCEPSS rescore
  9. 2026-07-12 05:43 UTCEPSS rescore
  10. 2026-07-11 08:24 UTCEPSS rescore
  11. 2026-07-04 00:26 UTCOSV refresh
  12. 2026-07-01 15:03 UTCEPSS rescore
  13. 2026-07-01 15:03 UTCEPSS rescore
  14. 2026-06-29 14:03 UTCEPSS rescore
  15. 2026-06-25 13:47 UTCEPSS rescore
  16. 2026-06-25 13:47 UTCEPSS rescore
  17. 2026-06-23 21:30 UTCEPSS rescore
  18. 2026-06-22 14:23 UTCEPSS rescore
  19. 2026-06-21 01:57 UTCEPSS rescore
  20. 2026-06-21 01:57 UTCEPSS rescore
  21. 2026-06-15 17:45 UTCEPSS rescore
  22. 2026-06-15 12:13 UTCOSV refresh
  23. 2026-06-13 22:58 UTCEPSS rescore
  24. 2026-06-13 22:58 UTCEPSS rescore
  25. 2026-06-12 23:09 UTCEPSS rescore
Show 18 more
  1. 2026-06-11 13:57 UTCEPSS rescore
  2. 2026-06-10 22:16 UTCEPSS rescore
  3. 2026-06-06 13:45 UTCEPSS rescore
  4. 2026-06-06 13:45 UTCEPSS rescore
  5. 2026-06-05 22:45 UTCEPSS rescore
  6. 2026-06-05 22:44 UTCEPSS rescore
  7. 2026-06-05 06:08 UTCEPSS rescore
  8. 2026-06-05 06:08 UTCEPSS rescore
  9. 2026-06-01 13:49 UTCEPSS rescore
  10. 2026-05-31 00:14 UTCEPSS rescore
  11. 2026-05-31 00:14 UTCEPSS rescore
  12. 2026-05-28 13:42 UTCEPSS rescore
  13. 2026-05-28 13:42 UTCEPSS rescore
  14. 2026-05-28 02:32 UTCEG score recompute
  15. 2026-05-28 02:32 UTCVendor advisory
  16. 2026-05-27 13:38 UTCEPSS rescore
  17. 2026-05-27 13:38 UTCEPSS rescore
  18. 2026-05-23 09:31 UTCOSV refresh

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-50118
    First seen Jul 13, 2021

    Apache Tomcat 9.0.0.M1 - Open Redirect

    Open source ↗
  • Nucleihttp/cves/2018/CVE-2018-11784.yaml
    First seen Jan 1, 2018

    Apache Tomcat - Open Redirect

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2018-11784?
CVE-2018-11784 is a critical vulnerability published on October 4, 2018. When the default servlet in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33 and 7.0.23 to 7.0.90 returned a redirect to a directory (e.g. redirecting to '/foo/' when the user requested '/foo') a specially crafted URL could be used to cause the redirect to be generated to any URI of the…
When was CVE-2018-11784 disclosed?
CVE-2018-11784 was first published in the National Vulnerability Database on October 4, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-11784 actively exploited?
CVE-2018-11784 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 94% probability of exploitation in the next 30 days, which ranks it in the top 0.2% of all scored CVEs.
What is the CVSS score of CVE-2018-11784?
CVE-2018-11784 has a CVSS v3 base score of 4.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2018-11784?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-11784, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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