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CVE-2026-33137

XWiki Platform has an Unauthenticated XAR Import via REST /wikis/{wikiName}

Published: May 20, 2026Updated: May 26, 2026 Sources: CVE List NVD BDUCWE-862
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.5%
Top 58.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. XWiki Platform is a generic wiki platform. In versions starting with 15.10.6 and prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17, the POST /wikis/{wikiName} API executes a XAR import without performing any authentication or authorization checks, allowing an unauthenticated attacker to create or update documents in the target wiki. This vulnerability has been patched in XWiki 16.10.17, 17.4.9, 17.10.3, 18.0.1 and 18.1.0-rc-1.

CVSS Vector Breakdown

AV:NAC:LC:HI:NA:N
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Impact
C:HConfidentiality
H
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-862

Affected Products

xwiki-platformxwiki
On-premWeb App
Web & CMS Plugins / cms-core
XWiki PlatformСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
xwikioss-projectFRWeb & CMS Pluginsaka xwiki-platform, xwiki-commons
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qrvh-r3f2-9h4r
github.com
https://github.com/xwiki/xwiki-platform/commit/4b7b95b79256374d487e9ece1dc48f527966990f
github.com
https://jira.xwiki.org/browse/XWIKI-23953
jira.xwiki.org
and 2 more references View all →

Timeline

Published
May 20, 2026
Last Updated
May 26, 2026

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