Wikimedia · Cross-site Scripting
Source GCVE Database
Not known to be exploited · CVSS 6.1 Medium : upgrade to 1.46.1 when convenient.
Data as of 11 Nov 2026, 23:24 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.46.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 29 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Upgrade Mediawiki – WikiLambda Extension to 1.46.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| The Wikimedia FoundationMediawiki - WikiLambda Extension | Affected
| Fixed in
|
AI-suggested
Upgrade the MediaWiki WikiLambda extension to version 1.46.1 or later, where this vulnerability has been fixed. Since this is a self-hosted software component, administrators should apply the official update promptly to remediate the issue. No additional vendor advisory content is available to indicate alternative mitigations or temporary fixes.
Description
A stored cross-site scripting (XSS) vulnerability exists in the Wikimedia Foundation MediaWiki WikiLambda extension prior to version 1.46.1. This vulnerability is due to improper neutralization of input during web page generation, which allows malicious scripts to be stored and executed in users' browsers. The issue is classified as high severity. No CVSS score is provided. No known exploits in the wild have been reported. The vulnerability affects versions before 1.46.1.