What’s Vulnerable › Vulnerabilities

CVE-2023-26477: org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 74.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-03-02 · updated 2026-06-17
• Weakness: CWE-95

Description

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.

Affected products

• xwiki-platform: from 6.2.4 before 13.10.10; from 14.0 before 14.4.6; from 14.5 before 14.9 — fixed in 13.10.10, 14.4.6, 14.9

How to fix

Upgrade to a fixed version: xwiki-platform 13.10.10, 14.4.6, 14.9. Check the vendor advisory for mitigations.

References

• https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284
• https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpg
• https://jira.xwiki.org/browse/XWIKI-19757
• https://github.com/xwiki/xwiki-platform/commit/ea2e615f50a918802fd60b09ec87aa04bc6ea8e2#diff-e2153fa59f9d92ef67b0afbf27984bd17170921a3b558fac227160003d0dfd2aR283-R284
• https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-x2qm-r4wx-8gpg
• https://jira.xwiki.org/browse/XWIKI-19757

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