CVE-2025-66473: XWiki's REST APIs don't enforce any limits, leading to unavailability and OOM in large wikis

CVE-2025-66473 · Severity: high · CVSS 7.5 · Published 2025-12-10

XWiki is an open-source wiki software platform. Versions 16.10.10 and below, 17.0.0-rc-1 through 17.4.3 and 17.5.0-rc-1 through 17.6.0 contain a REST API which doesn't enforce any limits for the number of items that can be requested in a single request at the moment. Depending on the number of pages in the wiki and the memory configuration, this can lead to slowness and unavailability of the wiki. As an example, the /rest/wikis/xwiki/spaces resource returns all spaces on the wiki by default, which are basically all pages. This issue is fixed in versions 17.4.4 and 16.10.11.

Technologies: org.xwiki.platform:xwiki-platform-rest-server (Maven). Vendors: Maven.

Quick answers

Is CVE-2025-66473 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-66473 being exploited in the wild.
How severe is CVE-2025-66473?
High severity, with a CVSS score of 7.5, published 10 December 2025.
Which products and versions are affected?
org.xwiki.platform:xwiki-platform-rest-server (Maven) ECOSYSTEM:introduced=0,fixed=16.10.11.
Is there a fix for CVE-2025-66473?
Yes. org.xwiki.platform:xwiki-platform-rest-server (Maven): upgrade to 16.10.11 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-66473?
Check whether you run org.xwiki.platform:xwiki-platform-rest-server (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • org.xwiki.platform:xwiki-platform-rest-server (Maven): upgrade to 16.10.11 or later
    # set org.xwiki.platform:xwiki-platform-rest-server to 16.10.11 in your pom.xml or build.gradle

Affected products

  • org.xwiki.platform:xwiki-platform-rest-server (Maven) ECOSYSTEM:introduced=0,fixed=16.10.11

Identifiers

  • CVE-2025-66473
  • GHSA-cc84-q3v3-mhgf

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.