CVE-2025-66473

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

State: Published
Severity: 8.7 High
Published: Dec 10, 2025
Updated: Dec 11, 2025
Reserved: Dec 2, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	GitHub_M

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
xwiki-platformxwiki	< 16.10.11Affected >= 17.0.0-rc-1, < 17.4.4Affected >= 17.5.0-rc-1, < 17.7.0-rc-1Affected

References

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