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Advisory record · GHSA-h259-74h5-4rh9

XWiki vulnerable to remote code execution with script right through unprotected Velocity scripting API

CVSS 8.6 HighEPSS 0.0055 · 46th percentile

Published by the GitHub Advisory Database at 8 Apr 2026, 15:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.xwiki.platform:xwiki-platform-oldcoreMaven>=17.0.0-rc-1, <17.4.8 || >=17.5.0-rc-1, <17.10.117.4.8, 17.10.1
org.xwiki.platform:xwiki-platform-legacy-oldcoreMaven>=17.0.0-rc-1, <17.4.8 || >=17.5.0-rc-1, <17.10.117.4.8, 17.10.1
Identifiers
GHSA-h259-74h5-4rh9 · CVE-2026-33229
Weakness (CWE)
CWE-862
Tags
Published
8 Apr 2026
Updated
8 Apr 2026

Machine-written summary

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

XWiki's xwiki-platform-oldcore and xwiki-platform-legacy-oldcore packages, versions 17.0.0-rc-1 up to 17.4.8 and 17.5.0-rc-1 up to 17.10.1, have an improperly protected Velocity scripting API. A user with script right can bypass the Velocity sandbox and run arbitrary code, such as Python scripts, gaining full access to the XWiki instance. Upgrade to 17.4.8 or 17.10.1. The only workaround listed is to limit script right to trusted users.

Written 3 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
8.6 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0055, the 46th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:20 UTC First seen by agentprime
  2. 31 Oct 2026, 14:20 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.