CVE-2026-22711: CWE-87 Improper neutralization of alternate XSS syntax in The Wikimedia Foundation Mediawiki - Wikilove Extension
CVE-2026-22711 is a medium severity vulnerability in the Wikimedia Foundation's Mediawiki Wikilove Extension involving improper neutralization of alternate cross-site scripting (XSS) syntax. This flaw allows XSS attacks due to insufficient sanitization of input. The issue has been fixed in the master branch and release branches for MediaWiki versions 1. 43, 1. 44, and 1. 45. No known exploits are reported in the wild. The vulnerability has a CVSS 4. 0 base score of 6. 9, indicating a moderate risk level.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-22711) concerns improper neutralization of alternate XSS syntax (CWE-87) in the Mediawiki Wikilove Extension maintained by the Wikimedia Foundation. It enables cross-site scripting attacks by failing to properly sanitize certain inputs. The Wikimedia Foundation has remediated the issue in the master branch and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and low to low impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the affected Mediawiki instance, potentially leading to session hijacking, defacement, or other client-side impacts. However, the impact is rated medium severity with no known exploits in the wild. The vulnerability affects only specific versions of the Wikilove Extension prior to the fixed branches.
Mitigation Recommendations
The vulnerability has been remediated in the master branch and release branches for MediaWiki versions 1.43, 1.44, and 1.45. Users should upgrade to one of these fixed versions to mitigate the risk. Since this is not a cloud service, remediation requires applying the official patches or upgrading the affected software. Patch status is not explicitly confirmed beyond the stated remediations; users should verify with the Wikimedia Foundation advisories for the latest updates.
CVE-2026-22711: CWE-87 Improper neutralization of alternate XSS syntax in The Wikimedia Foundation Mediawiki - Wikilove Extension
Description
CVE-2026-22711 is a medium severity vulnerability in the Wikimedia Foundation's Mediawiki Wikilove Extension involving improper neutralization of alternate cross-site scripting (XSS) syntax. This flaw allows XSS attacks due to insufficient sanitization of input. The issue has been fixed in the master branch and release branches for MediaWiki versions 1. 43, 1. 44, and 1. 45. No known exploits are reported in the wild. The vulnerability has a CVSS 4. 0 base score of 6. 9, indicating a moderate risk level.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-22711) concerns improper neutralization of alternate XSS syntax (CWE-87) in the Mediawiki Wikilove Extension maintained by the Wikimedia Foundation. It enables cross-site scripting attacks by failing to properly sanitize certain inputs. The Wikimedia Foundation has remediated the issue in the master branch and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and low to low impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the affected Mediawiki instance, potentially leading to session hijacking, defacement, or other client-side impacts. However, the impact is rated medium severity with no known exploits in the wild. The vulnerability affects only specific versions of the Wikilove Extension prior to the fixed branches.
Mitigation Recommendations
The vulnerability has been remediated in the master branch and release branches for MediaWiki versions 1.43, 1.44, and 1.45. Users should upgrade to one of these fixed versions to mitigate the risk. Since this is not a cloud service, remediation requires applying the official patches or upgrading the affected software. Patch status is not explicitly confirmed beyond the stated remediations; users should verify with the Wikimedia Foundation advisories for the latest updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- wikimedia-foundation
- Date Reserved
- 2026-01-08T23:23:42.385Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d5874b43e2781bad84eb03
Added to database: 4/7/2026, 10:38:03 PM
Last enriched: 4/15/2026, 12:35:17 PM
Last updated: 5/23/2026, 9:01:30 PM
Views: 59
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