Stored XSS in TwoColConflict
Priority LOW 34CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TwoColConflict Extension allows Stored XSS.This issue affects Mediawiki - TwoColConflict Extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00263 18th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Mediawiki - TwoColConflict Extension (Wikimedia Foundation): 1.39.13, 1.42.7, 1.43.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- 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 |
|---|---|---|---|---|---|
| Wikimedia Foundation | Mediawiki - TwoColConflict Extension | 1.39.x to before 1.39.13; 1.42.x to before 1.42.7; 1.43.x to before 1.43.2 | 1.39.13, 1.42.7, 1.43.2 | Patch available | CNA |
- Mediawiki - TwoColConflict Extension VendorWikimedia Foundation Affected 1.39.x to before 1.39.13; 1.42.x to before 1.42.7; 1.43.x to before 1.43.2 Fixed in 1.39.13, 1.42.7, 1.43.2 Patch available CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wmde-fisch:twocolconflict:*:*:*:*:*:mediawiki:*:* | before 2025-05-26 | Vulnerable | Wmde-fisch |
| cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* | 1.39.0 to before 1.39.13; 1.42.0 to before 1.42.7; 1.43.0 to before 1.43.2 | Running on | mediawiki |
- cpe:2.3:a:wmde-fisch:twocolconflict:*:*:*:*:*:mediawiki:*:* Versions before 2025-05-26 Vulnerable ·Wmde-fisch
- cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* Versions 1.39.0 to before 1.39.13; 1.42.0 to before 1.42.7; 1.43.0 to before 1.43.2 Running on ·mediawiki
Remediation
- Fix · CNA Mediawiki - TwoColConflict Extension (Wikimedia Foundation) Fixed in 1.39.13, 1.42.7, 1.43.2
Timeline
- 2026-10-02 Threatist record created from CVE-2025-53494
- 2026-10-03 Alias added: GHSA-986p-23cm-hgg6
References
More Wikimedia Foundation vulnerabilities
- TI-2025-11006 The compare API module breaks Extension:Lockdown CVSS 4.0CRITICAL 10.0
- TI-2024-32110 Backticks can allow the usage of not-allowed SQL functions CVSS 4.0HIGH 8.8
- TI-2026-65500 Unauthenticated SQL injection in UserPageViewTracker via filterusers and ignoreusers parameters CVSS 3.1HIGH 7.5
- TI-2026-64588 DataTransfer depends on phpspreadsheet version vulnerable to CVE-2026-59933 (XLS/OLE memory exhaustion) CVSS 3.1HIGH 7.5
- TI-2026-42112 SQLi in Cargo extension via year range filter CVSS 4.0MEDIUM 6.9
- TI-2026-42110 Stored XSS through Cargo's map format CVSS 4.0MEDIUM 6.9
Sources
- CVE-2025-53494 · CVE Program
- CVE-2025-53494 · NVD
- FIRST EPSS
- GHSA-986p-23cm-hgg6 · GitHub Advisory Database · CC BY 4.0
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