CVE-2026-116883
Semantic MediaWiki 3.1.0 before 7.3.1 Stored XSS via Schema Descriptions
- State
- Published
- Severity
- 4.8 Medium
- Published
- Oct 27, 2026
- Updated
- Oct 27, 2026
- Reserved
- Oct 27, 2026
Description
Semantic MediaWiki from 3.1.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows authenticated schema editors to inject HTML through schema descriptions. Attackers with the smw-schemaedit permission can save HTML that is passed unescaped to Html::rawElement() in HtmlBuilder, altering pages and targeting users who view the schema.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N | VulnCheck |
| 3.1 | 4.8 Medium | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
SemanticMediaWikiSemanticMediaWiki |
|
References
- GitHub Security Advisory (GHSA-2xr9-cr6h-wr6m)vendor-advisory
- VulnCheck Advisory: Semantic MediaWiki 3.1.0 before 7.3.1 Stored XSS via Schema Descriptionsthird-party-advisory
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