Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The XWiki Platform web application (org.xwiki.platform:xwiki-platform-web-war, Maven) is vulnerable to cross-site scripting through a malicious attachment filename in the uploader in versions from 4.2-milestone-3 up to but not including 14.10.21, 15.0-rc-1 up to 15.5.5, 15.6-rc-1 up to 15.10.6, and 16.0.0-rc-1 up to 16.0.0. An attacker must socially engineer a user into uploading a file with a crafted name, and the script then runs in that user's browser, acting with their privileges. Upgrade to 14.10.21, 15.5.5, 15.10.6, or 16.0.0. The source lists no workaround other than upgrading.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.4 | Medium | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.16, the 96th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:13 UTC First seen by agentprime
- 31 Oct 2026, 15:13 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-wf3x-jccf-5g5g
- OSV: GHSA-wf3x-jccf-5g5g
- github.com/xwiki/xwiki-platform/security/advisories/GHSA-wf3x-jccf-5g5g
- nvd.nist.gov/vuln/detail/CVE-2024-37900
- github.com/xwiki/xwiki-platform/commit/6cdd69d31d6bf3caa7f40ec55eb317e4e528ad28
- github.com/xwiki/xwiki-platform/commit/8b8a2d80529b9a9c038014c1eb6c2adc08069dfd
- github.com/xwiki/xwiki-platform/commit/910a5018a50039e8b24556573dfe342f143ef949
- github.com/xwiki/xwiki-platform/commit/9df46f8e5313af46f93bccd1ebc682e28126573f
- github.com/xwiki/xwiki-platform
- jira.xwiki.org/browse/XWIKI-19602
- jira.xwiki.org/browse/XWIKI-19611
- jira.xwiki.org/browse/XWIKI-21769