CVE-2024-23176: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in MediaWiki MassMessage
An issue was discovered in the MassMessage extension in MediaWiki before 1.40.2. For a Special:MassMessage?uselang=x-xss URL, the i18n key massmessage-form-page-help allows XSS.
AI Analysis
Technical Summary
The MassMessage extension in MediaWiki before 1.40.2 contains an XSS vulnerability due to improper input sanitization in the i18n key massmessage-form-page-help. When a user accesses Special:MassMessage with a crafted uselang parameter (uselang=x-xss), the extension fails to properly neutralize the input, enabling cross-site scripting attacks. This vulnerability is tracked as CVE-2024-23176 with a CVSS 3.1 base score of 5.4 (medium severity).
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with at least low privileges to execute arbitrary scripts in the context of the victim's browser session. This could lead to limited confidentiality and integrity impacts, such as theft of user data or session tokens. There is no impact on availability reported.
Mitigation Recommendations
Upgrade MediaWiki MassMessage extension to version 1.40.2 or later where this vulnerability is fixed. No other mitigation or temporary workaround is indicated in the provided data.
CVE-2024-23176: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in MediaWiki MassMessage
Description
An issue was discovered in the MassMessage extension in MediaWiki before 1.40.2. For a Special:MassMessage?uselang=x-xss URL, the i18n key massmessage-form-page-help allows XSS.
CVSS v3.1
Score 5.4medium
Affected software
MediaWiki
MassMessage
pkg:github/mediawiki/massmessageRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The MassMessage extension in MediaWiki before 1.40.2 contains an XSS vulnerability due to improper input sanitization in the i18n key massmessage-form-page-help. When a user accesses Special:MassMessage with a crafted uselang parameter (uselang=x-xss), the extension fails to properly neutralize the input, enabling cross-site scripting attacks. This vulnerability is tracked as CVE-2024-23176 with a CVSS 3.1 base score of 5.4 (medium severity).
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with at least low privileges to execute arbitrary scripts in the context of the victim's browser session. This could lead to limited confidentiality and integrity impacts, such as theft of user data or session tokens. There is no impact on availability reported.
Mitigation Recommendations
Upgrade MediaWiki MassMessage extension to version 1.40.2 or later where this vulnerability is fixed. No other mitigation or temporary workaround is indicated in the provided data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2024-01-12T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa79bfd55bf5e2cf5ac9d63
Added to database: 09/14/2026, 07:02:21 UTC
Last enriched: 09/14/2026, 07:33:42 UTC
Last updated: 09/14/2026, 22:11:25 UTC
Views: 5
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