Semantic MediaWiki affected by Special:Ask table `sep` parameter reflected XSS
Priority LOW 27CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- 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. Prior to version 7.2.0, `sep` was inserted verbatim into HTML cell joins. This made it possible to inject HTML through the separator value. Version 7.2.0 fixes the issue.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00283 20th percentileScored 2026-11-07
Fix Fixed SemanticMediaWiki (SemanticMediaWiki): 7.2.0mediawiki/semantic-media-wiki (Packagist): 7.2.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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 | before 7.2.0 | 7.2.0 | Patch available | CNA |
| — | mediawiki/semantic-media-wiki (Packagist) | before 7.2.0 | 7.2.0 | Patch available | GHSA-7xv3-gf2g-498h |
- SemanticMediaWiki VendorSemanticMediaWiki Affected before 7.2.0 Fixed in 7.2.0 Patch available CNA
- mediawiki/semantic-media-wiki (Packagist) Vendor— Affected before 7.2.0 Fixed in 7.2.0 Patch available GHSA-7xv3-gf2g-498h
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 7.2.0
- Fix · GHSA-7xv3-gf2g-498h mediawiki/semantic-media-wiki (Packagist) Fixed in 7.2.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-77607
- 2026-10-03 Alias added: GHSA-7xv3-gf2g-498h
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-2025-38114 Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes CVSS 3.1HIGH 8.6
- 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
Sources
- CVE-2026-77607 · CVE Program
- CVE-2026-77607 · NVD
- FIRST EPSS
- GHSA-7xv3-gf2g-498h · 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