CVE-2023-26477

CRITICALNVD 10.010.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2023-03-03. NVD baseline CVSS 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated

Also known asEUVD-2023-1137 (ENISA EUVD) · GHSA-x2qm-r4wx-8gpg (GitHub Security Advisories)Source: ENISA EUVD

10.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High exploitation likelihood — EPSS 75%
CISA-KEV: Not listedEPSS PROB: 75%CVSS: 10.0Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

XWiki Platform is a generic wiki platform. Starting in versions 6.3-rc-1 and 6.2.4, it's possible to inject arbitrary wiki syntax including Groovy, Python and Velocity script macros via the newThemeName request parameter (URL parameter), in combination with additional parameters. This has been patched in the supported versions 13.10.10, 14.9-rc-1, and 14.4.6. As a workaround, it is possible to edit FlamingoThemesCode.WebHomeSheet and manually perform the changes from the patch fixing the issue.

CVSS v3
10.0
EG Score
10.0CRITICALmedium confidence
EG Risk
75
EG Risk 75/100

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)
Severity100% × 45%
Impact severity (EG Severity): CVSS 10.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation75% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (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
75%
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 (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.

EG Severity
10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
75% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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 (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (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 Vulnrichment) · Technical impact total (CISA Vulnrichment). 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

March 2, 2023

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Nov 8, 2026
Patch available. Sources: github, github_commit.
Web page

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https://jira.xwiki.org/browse/XWIKI-19757
GitHub advisoryMentions a patch (unverified)

Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection') in org.xwiki.platform:xwiki-platform-flamingo-theme-ui · Advisory · xwiki/xwiki-platform · GitHub

https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpg
GitHub commit Patch Available

commit ea2e615f50a9 (xwiki/xwiki-platform)

Patch available: xwiki/xwiki-platform xwiki-platform-18.3.0 (contains commit ea2e615f50a9)

https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284

Vendor Advisories for CVE-2023-26477(1)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
mavenorg.xwiki.platform:xwiki-platform-flamingo-theme-ui @ 13.10.10 (fixes >= 6.2.4, < 13.10.10)—ghsa
mavenorg.xwiki.platform:xwiki-platform-flamingo-theme-ui @ 14.4.6 (fixes >= 14.0, < 14.4.6)—ghsa
mavenorg.xwiki.platform:xwiki-platform-flamingo-theme-ui @ 14.9-rc-1 (fixes >= 14.5, < 14.9-rc-1)—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

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
org.xwiki.platform:xwiki-platform-flamingo-theme-ui—
  • 6.2.4 up to 13.10.10: fixed in 13.10.10
  • 14.0 up to 14.4.6: fixed in 14.4.6
  • 14.5 up to 14.9-rc-1: fixed in 14.9-rc-1
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 31× 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 189 rows on record for this CVE.

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. None are among the latest 100 rows. The 89 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 21:30 UTCEchelonGraph re-scored
  2. 2026-11-12 21:30 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  3. 2026-11-12 16:30 UTCEPSS rescoreEPSS 75% · 99th percentile
  4. 2026-11-11 20:50 UTCEchelonGraph re-scored
  5. 2026-11-11 20:50 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  6. 2026-11-11 16:33 UTCEPSS rescoreEPSS 75% · 99th percentile
  7. 2026-11-10 20:01 UTCEchelonGraph re-scored
  8. 2026-11-10 20:01 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  9. 2026-11-10 16:37 UTCEPSS rescoreEPSS 75% · 99th percentile
  10. 2026-11-09 19:17 UTCEchelonGraph re-scored
  11. 2026-11-09 19:17 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  12. 2026-11-08 18:36 UTCEchelonGraph re-scored
  13. 2026-11-08 18:36 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  14. 2026-11-07 17:56 UTCEchelonGraph re-scored
  15. 2026-11-07 17:56 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  16. 2026-11-07 16:34 UTCEPSS rescoreEPSS 75% · 99th percentile
  17. 2026-11-06 17:17 UTCEchelonGraph re-scored
  18. 2026-11-06 17:17 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  19. 2026-11-05 16:38 UTCEchelonGraph re-scored
  20. 2026-11-05 16:38 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  21. 2026-11-05 16:33 UTCEPSS rescoreEPSS 75% · 99th percentile
  22. 2026-11-04 16:31 UTCEPSS rescoreEPSS 75% · 99th percentile
  23. 2026-11-04 15:58 UTCEchelonGraph re-scored
  24. 2026-11-04 15:58 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  25. 2026-11-04 11:25 UTCOSV refresh
Show 75 more
  1. 2026-11-03 16:40 UTCEPSS rescoreEPSS 75% · 99th percentile
  2. 2026-11-03 15:18 UTCEchelonGraph re-scored
  3. 2026-11-03 15:18 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  4. 2026-11-02 14:39 UTCEchelonGraph re-scored
  5. 2026-11-02 14:39 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  6. 2026-11-01 13:58 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  7. 2026-11-01 08:21 UTCGHSA enrichmentGHSA-x2qm-r4wx-8gpg · GitHub severity CRITICAL · GitHub CVSS 10.0
  8. 2026-11-01 08:21 UTCEchelonGraph re-scored
  9. 2026-10-31 16:29 UTCEPSS rescoreEPSS 75% · 99th percentile
  10. 2026-10-31 13:18 UTCEchelonGraph re-scored
  11. 2026-10-30 16:31 UTCEPSS rescoreEPSS 75% · 99th percentile
  12. 2026-10-30 12:38 UTCEchelonGraph re-scored
  13. 2026-10-29 11:57 UTCEchelonGraph re-scored
  14. 2026-10-28 16:29 UTCEPSS rescoreEPSS 75% · 99th percentile
  15. 2026-10-28 11:13 UTCEchelonGraph re-scored
  16. 2026-10-27 16:29 UTCEPSS rescoreEPSS 75% · 99th percentile
  17. 2026-10-27 09:56 UTCEchelonGraph re-scored
  18. 2026-10-25 17:46 UTCEchelonGraph re-scored
  19. 2026-10-25 16:29 UTCEPSS rescoreEPSS 75% · 99th percentile
  20. 2026-10-25 08:37 UTCEchelonGraph re-scored
  21. 2026-10-24 07:57 UTCEchelonGraph re-scored
  22. 2026-10-23 16:29 UTCEPSS rescoreEPSS 75% · 99th percentile
  23. 2026-10-23 07:15 UTCEchelonGraph re-scored
  24. 2026-10-22 06:35 UTCEchelonGraph re-scored
  25. 2026-10-21 16:29 UTCEPSS rescoreEPSS 75% · 99th percentile
  26. 2026-10-21 05:51 UTCEchelonGraph re-scored
  27. 2026-10-20 05:12 UTCEchelonGraph re-scored
  28. 2026-10-19 16:29 UTCEPSS rescoreEPSS 75% · 99th percentile
  29. 2026-10-19 04:31 UTCEchelonGraph re-scored
  30. 2026-10-18 03:49 UTCEchelonGraph re-scored
  31. 2026-10-17 03:08 UTCEchelonGraph re-scored
  32. 2026-10-16 16:35 UTCEPSS rescoreEPSS 75% · 99th percentile
  33. 2026-10-16 02:28 UTCEchelonGraph re-scored
  34. 2026-10-14 22:25 UTCEchelonGraph re-scored
  35. 2026-10-14 16:29 UTCEPSS rescoreEPSS 75% · 99th percentile
  36. 2026-10-13 18:05 UTCEchelonGraph re-scored
  37. 2026-10-13 16:29 UTCEPSS rescoreEPSS 75% · 99th percentile
  38. 2026-10-12 17:24 UTCEchelonGraph re-scored
  39. 2026-10-11 21:56 UTCEchelonGraph re-scored
  40. 2026-10-11 13:45 UTCEPSS rescoreEPSS 75% · 99th percentile
  41. 2026-10-09 20:05 UTCEPSS rescoreEPSS 75% · 99th percentile
  42. 2026-10-07 23:45 UTCEPSS rescoreEPSS 75% · 99th percentile
  43. 2026-10-05 17:41 UTCEPSS rescoreEPSS 75% · 99th percentile
  44. 2026-10-02 16:23 UTCEPSS rescoreEPSS 75% · 99th percentile
  45. 2026-09-30 16:19 UTCEchelonGraph re-scored
  46. 2026-09-30 15:01 UTCEPSS rescoreEPSS 75% · 99th percentile
  47. 2026-09-24 14:01 UTCEPSS rescoreEPSS 75% · 99th percentile
  48. 2026-09-23 19:34 UTCOSV refresh
  49. 2026-09-23 13:45 UTCEPSS rescoreEPSS 75% · 99th percentile
  50. 2026-09-22 14:45 UTCEPSS rescoreEPSS 75% · 99th percentile
  51. 2026-09-20 20:14 UTCEPSS rescoreEPSS 75% · 99th percentile
  52. 2026-09-16 14:05 UTCEPSS rescoreEPSS 75% · 99th percentile
  53. 2026-09-13 16:44 UTCEPSS rescoreEPSS 75% · 99th percentile
  54. 2026-09-12 14:58 UTCEPSS rescoreEPSS 75% · 99th percentile
  55. 2026-09-11 09:34 UTCEPSS rescoreEPSS 75% · 99th percentile
  56. 2026-09-06 13:45 UTCEPSS rescoreEPSS 75% · 99th percentile
  57. 2026-09-05 15:25 UTCEPSS rescoreEPSS 75% · 99th percentile
  58. 2026-09-04 14:24 UTCOSV refresh
  59. 2026-09-02 14:09 UTCEPSS rescoreEPSS 75% · 99th percentile
  60. 2026-09-01 13:51 UTCEPSS rescoreEPSS 75% · 99th percentile
  61. 2026-08-30 19:15 UTCEPSS rescoreEPSS 75% · 99th percentile
  62. 2026-08-28 21:38 UTCEPSS rescoreEPSS 75% · 99th percentile
  63. 2026-08-27 14:23 UTCEPSS rescoreEPSS 75% · 99th percentile
  64. 2026-08-26 14:43 UTCEPSS rescoreEPSS 75% · 99th percentile
  65. 2026-08-24 14:14 UTCEPSS rescoreEPSS 75% · 99th percentile
  66. 2026-08-21 23:46 UTCEPSS rescoreEPSS 75% · 99th percentile
  67. 2026-08-20 22:53 UTCEPSS rescoreEPSS 75% · 99th percentile
  68. 2026-08-19 17:02 UTCEPSS rescoreEPSS 75% · 99th percentile
  69. 2026-08-18 13:46 UTCEPSS rescoreEPSS 75% · 99th percentile
  70. 2026-08-18 01:39 UTCOSV refresh
  71. 2026-08-17 13:44 UTCEPSS rescoreEPSS 75% · 99th percentile
  72. 2026-08-16 14:53 UTCEPSS rescoreEPSS 75% · 99th percentile
  73. 2026-08-16 02:12 UTCEPSS rescoreEPSS 75% · 99th percentile
  74. 2026-08-15 01:28 UTCEPSS rescoreEPSS 75% · 99th percentile
  75. 2026-08-13 21:58 UTCEPSS rescoreEPSS 75% · 99th percentile

Related CVEs(same product + same CWE)

Same product

3 shown

Maven:org.xwiki.platform:xwiki-platform-flamingo-theme-ui

Frequently asked(5)

What is CVE-2023-26477?
CVE-2023-26477 is a critical-severity vulnerability; its CVE record was published on March 2, 2023. XWiki Platform is a generic wiki platform. Starting in versions 6.3-rc-1 and 6.2.4, it's possible to inject arbitrary wiki syntax including Groovy, Python and Velocity script macros via the newThemeName request parameter (URL parameter), in combination with additional parameters. This has been…
When was the CVE record for CVE-2023-26477 published?
The CVE record for CVE-2023-26477 was published on March 2, 2023. That is the record's publication date; the vulnerability itself may have been made public earlier. 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-2023-26477 actively exploited?
CVE-2023-26477 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-26477?
CVE-2023-26477 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2023-26477?
A fix for CVE-2023-26477 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-26477 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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