GHSA-qrvh-r3f2-9h4r

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Source
https://github.com/advisories/GHSA-qrvh-r3f2-9h4r
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qrvh-r3f2-9h4r/GHSA-qrvh-r3f2-9h4r.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-qrvh-r3f2-9h4r
Aliases
  • CVE-2026-33137
Published
2026-05-26T18:58:19Z
Modified
2026-05-26T19:15:08.643375137Z
Severity
  • 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
XWiki Platform has an Unauthenticated XAR Import via REST /wikis/{wikiName}
Details

Impact

POST /wikis/{wikiName} executes a XAR import without performing any authentication or authorization checks, allowing an unauthenticated attacker to create or update documents in the target wiki

Patches

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.

Workarounds

XWiki is not aware of any workarounds other than adding a rule into an HTTP proxy to prevent access POST request in the /wikis/{wikiName}[/] endpoint.

Resources

  • https://jira.xwiki.org/browse/XWIKI-23953
  • https://github.com/xwiki/xwiki-platform/commit/4b7b95b79256374d487e9ece1dc48f527966990f

For more information

If there are any questions or comments about this advisory: * Open an issue in Jira XWiki.org * Send an email to the Security Mailing List

Attribution

Reported by Sho Odagiri (GMO Cybersecurity by Ierae, Inc.).

Database specific 
{
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-26T18:58:19Z",
    "severity": "CRITICAL",
    "nvd_published_at": "2026-05-20T20:16:37Z",
    "cwe_ids": [
        "CWE-862"
    ]
}
References

Affected packages

Maven
org.xwiki.platform:xwiki-platform-rest-server

Package

Name
org.xwiki.platform:xwiki-platform-rest-server
View open source insights on deps.dev
Purl
pkg:maven/org.xwiki.platform/xwiki-platform-rest-server

Affected ranges

Type
ECOSYSTEM
Events
Introduced
15.10.6
Fixed
16.10.17

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qrvh-r3f2-9h4r/GHSA-qrvh-r3f2-9h4r.json"
org.xwiki.platform:xwiki-platform-rest-server

Package

Name
org.xwiki.platform:xwiki-platform-rest-server
View open source insights on deps.dev
Purl
pkg:maven/org.xwiki.platform/xwiki-platform-rest-server

Affected ranges

Type
ECOSYSTEM
Events
Introduced
17.0.0-rc-1
Fixed
17.4.9

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qrvh-r3f2-9h4r/GHSA-qrvh-r3f2-9h4r.json"
org.xwiki.platform:xwiki-platform-rest-server

Package

Name
org.xwiki.platform:xwiki-platform-rest-server
View open source insights on deps.dev
Purl
pkg:maven/org.xwiki.platform/xwiki-platform-rest-server

Affected ranges

Type
ECOSYSTEM
Events
Introduced
17.5.0
Fixed
17.10.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qrvh-r3f2-9h4r/GHSA-qrvh-r3f2-9h4r.json"
org.xwiki.platform:xwiki-platform-rest-server

Package

Name
org.xwiki.platform:xwiki-platform-rest-server
View open source insights on deps.dev
Purl
pkg:maven/org.xwiki.platform/xwiki-platform-rest-server

Affected ranges

Type
ECOSYSTEM
Events
Introduced
18.0.0-rc-1
Fixed
18.1.0-rc-1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qrvh-r3f2-9h4r/GHSA-qrvh-r3f2-9h4r.json"