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Fencer Vulns
critical 10.0

CVE-2023-26477 in the critical feed json

org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability

published 2023-03-02 3 y ago modified 2026-09-10 1 mo ago also GHSA-x2qm-r4wx-8gpg , EUVD-2023-1137

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
74.8%
EPSS 74.8% chance of exploitation in 30 days, percentile 99.5%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.xwiki.platform:xwiki-platform-flamingo-theme-ui 13.10.10, 14.4.6, 14.9-rc-1
  • xwiki xwiki 13.10.10, 14.4.6, 14.9

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

74.76% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpg referenced PoC, tagged "exploit" by a source, unverified
  • jira.xwiki.org https://jira.xwiki.org/browse/XWIKI-19757 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.xwiki.platform:xwiki-platform-flamingo-theme-ui
>=6.2.4, <13.10.10
>=14.0, <14.4.6
>=14.5, <14.9-rc-1
13.10.10
14.4.6
14.9-rc-1

Affected products

  • xwiki xwiki-platform

Classification

Weakness
  • CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.