Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes
Priority HIGH 76CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Versions starting in 3.1.0 and prior to 7.0.0 insert the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext. Version 7.0.0 patches the issue.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00401 34th percentileScored 2026-11-07
Fix Fixed SemanticMediaWiki (SemanticMediaWiki): 7.0.0mediawiki/semantic-media-wiki (Packagist): 7.0.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SemanticMediaWiki | SemanticMediaWiki | 3.1.0 to before 7.0.0 | 7.0.0 | Patch available | CNA |
| — | mediawiki/semantic-media-wiki (Packagist) | 3.1.0 to before 7.0.0 | 7.0.0 | Patch available | GHSA-hg8h-557g-q8pp |
- SemanticMediaWiki VendorSemanticMediaWiki Affected 3.1.0 to before 7.0.0 Fixed in 7.0.0 Patch available CNA
- mediawiki/semantic-media-wiki (Packagist) Vendor— Affected 3.1.0 to before 7.0.0 Fixed in 7.0.0 Patch available GHSA-hg8h-557g-q8pp
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:*:*:*:*:*:*:*:* | — | — | SemanticMediaWiki |
- cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:*:*:*:*:*:*:*:* Versions — — ·SemanticMediaWiki
Remediation
- Fix · CNA SemanticMediaWiki (SemanticMediaWiki) Fixed in 7.0.0
- Fix · GHSA-hg8h-557g-q8pp mediawiki/semantic-media-wiki (Packagist) Fixed in 7.0.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-61682
- 2026-10-03 Alias added: GHSA-hg8h-557g-q8pp
References
More SemanticMediaWiki vulnerabilities
- TI-2026-81081 Resource exhaustion in Semantic MediaWiki via #set_recurring_event CVSS 4.0HIGH 8.7
- TI-2026-81076 Semantic MediaWiki search lets attackers exhaust CPU via long terms CVSS 4.0HIGH 8.7
- TI-2026-81075 Uncontrolled recursion in Semantic MediaWiki via Special:Ask CVSS 4.0HIGH 8.7
- TI-2026-81077 Missing authorization in Semantic MediaWiki smwtask API CVSS 4.0MEDIUM 6.9
- TI-2026-81084 Cross-site request forgery in Semantic MediaWiki SMWAdmin page CVSS 4.0HIGH 7.1
- TI-2026-81083 Missing authorization in Semantic MediaWiki smwtask update task CVSS 4.0MEDIUM 6.9
Sources
- CVE-2025-61682 · CVE Program
- CVE-2025-61682 · NVD
- FIRST EPSS
- GHSA-hg8h-557g-q8pp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences