CVE-2026-126567
Semantic MediaWiki 3.0.0 before 7.4.1 Stored XSS via Special:Ask Debug Output
Description
Semantic MediaWiki 3.0.0 before 7.4.1 contains a stored cross-site scripting vulnerability in Special:Ask with the ElasticStore backend, allowing users with edit rights to inject script through unescaped native_result and score_set output. Attackers can store markup in a Text property or subobject name, then lure victims including administrators to a crafted Special:Ask link to execute script in their session.
INFO
Published Date :
Nov. 11, 2026, 2:36 a.m.
Last Modified :
Nov. 11, 2026, 2:36 a.m.
Remotely Exploit :
Yes !
Source :
VulnCheck
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
Solution
- Update Semantic MediaWiki to version 7.4.1 or later.
- Ensure ElasticStore backend is configured securely.
- Sanitize all user-supplied input.
- Validate all output for script execution.
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CVE-2026-126567 vulnerability anywhere in the article.