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Advisory record · GHSA-2r87-74cx-2p7c

XWiki allows remote code execution from account through macro descriptions and XWiki.XWikiSyntaxMacrosList

CVSS 10.0 CriticalCriticalEPSS 0.016 · 76th percentile

Critical, because:

  • CVSS score 10.0: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 12 Dec 2024, 19:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.xwiki.platform:xwiki-platform-help-uiMaven>=9.7-rc-1, <15.10.11 || >=16.0.0-rc-1, <16.4.1 || >=16.5.0-rc-1, <16.5.015.10.11, 16.4.1, 16.5.0
Identifiers
GHSA-2r87-74cx-2p7c · CVE-2024-55877
Weakness (CWE)
CWE-94 · CWE-96
Tags
Published
12 Dec 2024
Updated
12 Dec 2024

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The xwiki-platform-help-ui Maven package is affected in versions from 9.7-rc-1 up to 15.10.11, from 16.0.0-rc-1 up to 16.4.1, and from 16.5.0-rc-1 up to 16.5.0. Any user with an account can add a WikiMacroClass object to a page and run arbitrary code on the server, which affects the whole installation. Upgrade to 15.10.11, 16.4.1, or 16.5.0; a manual patch to the XWiki.XWikiSyntaxMacrosList page is also described as a workaround.

Written 7 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
10.0 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.016, the 76th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:12 UTC First seen by agentprime
  2. 31 Oct 2026, 15:12 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.