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Advisory record · GHSA-cc84-q3v3-mhgf

XWiki's REST APIs don't enforce any limits, leading to unavailability and OOM in large wikis

CVSS 8.7 HighEPSS 0.0043 · 37th percentile

Published by the GitHub Advisory Database at 10 Dec 2025, 15:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.xwiki.platform:xwiki-platform-rest-serverMaven<16.10.11 || >=17.0.0-rc-1, <17.4.4 || >=17.5.0-rc-1, <17.7.0-rc-116.10.11, 17.4.4, 17.7.0-rc-1
Identifiers
GHSA-cc84-q3v3-mhgf · CVE-2025-66473
Weakness (CWE)
CWE-770
Tags
Published
10 Dec 2025
Updated
11 Dec 2025

Machine-written summary

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

XWiki's xwiki-platform-rest-server is vulnerable in versions before 16.10.11, from 17.0.0-rc-1 before 17.4.4, and from 17.5.0-rc-1 before 17.7.0-rc-1. The REST API does not limit how many items a single request can return, so a request for a large wiki's spaces can exhaust memory and make the wiki slow or unavailable. Upgrade to 16.10.11, 17.4.4, 17.7.0-rc-1 or later. The source lists no workaround other than blocking the affected REST resources at a proxy in front of XWiki.

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
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0043, the 37th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:09 UTC First seen by agentprime
  2. 31 Oct 2026, 15:09 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.