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TI-2025-40900 Aliases CVE-2025-66473GHSA-cc84-q3v3-mhgf

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

Priority HIGH 77CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00403 34th percentileScored 2026-11-07
Fix Fixed xwiki-platform (xwiki): 16.10.11, 17.4.4, 17.7.0-rc-1org.xwiki.platform:xwiki-platform-rest-server (Maven): 16.10.11, 17.4.4, 17.7.0-rc-1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
XWikixwiki-platformbefore 16.10.11; 17.0.0-rc-1 to before 17.4.4; 17.5.0-rc-1 to before 17.7.0-rc-116.10.11, 17.4.4, 17.7.0-rc-1Patch availableCNA
—org.xwiki.platform:xwiki-platform-rest-server (Maven)before 16.10.1116.10.11Patch availableGHSA-cc84-q3v3-mhgf
—org.xwiki.platform:xwiki-platform-rest-server (Maven)17.0.0-rc-1 to before 17.4.417.4.4Patch availableGHSA-cc84-q3v3-mhgf
—org.xwiki.platform:xwiki-platform-rest-server (Maven)17.5.0-rc-1 to before 17.7.0-rc-117.7.0-rc-1Patch availableGHSA-cc84-q3v3-mhgf
  • xwiki-platform VendorXWiki Affected before 16.10.11; 17.0.0-rc-1 to before 17.4.4; 17.5.0-rc-1 to before 17.7.0-rc-1 Fixed in 16.10.11, 17.4.4, 17.7.0-rc-1 Patch available CNA
  • org.xwiki.platform:xwiki-platform-rest-server (Maven) Vendor— Affected before 16.10.11 Fixed in 16.10.11 Patch available GHSA-cc84-q3v3-mhgf
  • org.xwiki.platform:xwiki-platform-rest-server (Maven) Vendor— Affected 17.0.0-rc-1 to before 17.4.4 Fixed in 17.4.4 Patch available GHSA-cc84-q3v3-mhgf
  • org.xwiki.platform:xwiki-platform-rest-server (Maven) Vendor— Affected 17.5.0-rc-1 to before 17.7.0-rc-1 Fixed in 17.7.0-rc-1 Patch available GHSA-cc84-q3v3-mhgf

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*before 16.10.11; 17.0.0 to before 17.4.4; 17.5.0 – 17.6.0VulnerableXWiki
  • cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:* Versions before 16.10.11; 17.0.0 to before 17.4.4; 17.5.0 – 17.6.0 Vulnerable ·XWiki

Remediation

  • Fix · CNA xwiki-platform (xwiki) Fixed in 16.10.11, 17.4.4, 17.7.0-rc-1
  • Fix · GHSA-cc84-q3v3-mhgf org.xwiki.platform:xwiki-platform-rest-server (Maven) Fixed in 16.10.11 Advisory →
  • Fix · GHSA-cc84-q3v3-mhgf org.xwiki.platform:xwiki-platform-rest-server (Maven) Fixed in 17.4.4 Advisory →
  • Fix · GHSA-cc84-q3v3-mhgf org.xwiki.platform:xwiki-platform-rest-server (Maven) Fixed in 17.7.0-rc-1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-66473
  2. 2026-10-03 Alias added: GHSA-cc84-q3v3-mhgf

References

Patch 3

Advisory 1

Other 1

  • TI-2025-18595 Remote code execution as guest via SolrSearchMacros request in xwiki KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25214 Remote code execution through the section parameter in Administration as guest in XWiki Platform CVSS 3.1CRITICAL 10.0
  • TI-2025-23500 XWiki Platform vulnerable to SQL injection through getdeleteddocuments.vm template sort parameter CVSS 4.0CRITICAL 9.3
  • TI-2025-23979 org.xwiki.platform:xwiki-platform-rest-server allows SQL injection in query endpoint of REST API CVSS 4.0CRITICAL 9.3
  • TI-2024-20829 XWiki Platform: Remote code execution from account via SearchSuggestSourceSheet CVSS 3.1CRITICAL 10.0
  • TI-2024-14375 XWiki Remote Code Execution vulnerability via user registration CVSS 3.1CRITICAL 10.0
See all 247 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences