CVE-2026-33137 Details
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.
A vulnerability exists in XWiki Platform versions prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17, allowing unauthenticated users to import XAR files through the POST /wikis/{wikiName} API. This import is executed without any authentication or authorization checks, enabling attackers to create or modify documents within the targeted wiki. The issue arises from a removal of an indirect admin rights check in a previous update, which now allows guest users to import XAR files that could grant them additional privileges, such as programming rights.
Users can upgrade to XWiki versions 16.10.17, 17.4.9, 17.10.3, 18.0.1 or 18.1.0-rc-1 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 20, 2026CISA-ADP
Assessed May 21, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/xwiki/xwiki-platform/commit/4b7b95b79256374d487e9ece1dc48f527966990f | [email protected] | Source CodeVendor |
| https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qrvh-r3f2-9h4r | [email protected] | AdvisoryRemedyVendor |
| https://jira.xwiki.org/browse/XWIKI-23953 | [email protected] | Issue TrackingTechnical DescriptionVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-862 | Missing Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| XWiki Platform | >= 16.4.6, <= 16.10.2 (semver) >= 15.10.16, <= 15.10.16 (semver) |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 26, 2026 | CVE Modified | [email protected] |
| May 20, 2026 | New CVE Received | [email protected] |