Stored XSS through system messages in Skin:BlueSky
Priority MEDIUM 64CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. 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 - Skin:BlueSky allows Stored XSS.This issue affects Mediawiki - Skin:BlueSky: from master before 1.39.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00449 39th percentileScored 2026-11-07
Fix Fixed Mediawiki - Skin:BlueSky (Wikimedia Foundation): 1.39
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 |
|---|---|---|---|---|---|
| Wikimedia Foundation | Mediawiki - Skin:BlueSky | master to before 1.39 | 1.39 | Patch available | CNA |
- Mediawiki - Skin:BlueSky VendorWikimedia Foundation Affected master to before 1.39 Fixed in 1.39 Patch available CNA
Remediation
- Fix · CNA Mediawiki - Skin:BlueSky (Wikimedia Foundation) Fixed in 1.39
Timeline
- 2026-10-02 Threatist record created from CVE-2025-62665
- 2026-10-03 Alias added: GHSA-h73w-rr6h-gjf4
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-2025-62665 · CVE Program
- CVE-2025-62665 · NVD
- FIRST EPSS
- GHSA-h73w-rr6h-gjf4 · GitHub Advisory Database · CC BY 4.0
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