Unauthenticated Document Manipulation in XWiki Platform
CVE-2026-33137

9.3CRITICAL

Key Information:

Vendor

Xwiki
Status
Xwiki-platform
Vendor
CVE Published:
20 May 2026

What is CVE-2026-33137?

The XWiki Platform contains a vulnerability that allows unauthenticated attackers to execute the POST /wikis/{wikiName} API, enabling them to import XAR files without any authentication or authorization checks. This flaw permits unauthorized users to create or update documents within a target wiki, posing a significant security risk. The issue is resolved in XWiki versions 16.10.17, 17.4.9, 17.10.3, 18.0.1, and 18.1.0-rc-1.

Affected Version(s)

xwiki-platform < 16.10.17 < 16.10.17

xwiki-platform >= 17.0.0-rc-1, < 17.4.9 < 17.0.0-rc-1, 17.4.9

xwiki-platform >= 17.5.0, < 17.10.3 < 17.5.0, 17.10.3

References

https://github.com/xwiki/xwiki-platform/security/advisori...
x_refsource_CONFIRM
https://github.com/xwiki/xwiki-platform/commit/4b7b95b792...
x_refsource_MISC
https://jira.xwiki.org/browse/XWIKI-23953
x_refsource_MISC

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.