Description
An issue was discovered in MediaWiki before 1.31.10 and 1.32.x through 1.34.x before 1.34.4. The non-jqueryMsg version of mw.message().parse() doesn't escape HTML. This affects both message contents (which are generally safe) and the parameters (which can be based on user input). (When jqueryMsg is loaded, it correctly accepts only whitelisted tags in message contents, and escapes all parameters. Situations with an unloaded jqueryMsg are rare in practice, but can for example occur for Special:SpecialPages on a wiki with no extensions installed.)
Remediation
References
Related Vulnerabilities
Atlassian Confluence CVE-2023-22508 Vulnerability (CVE-2023-22508)
WordPress Plugin Elementor Addon Elements Cross-Site Request Forgery (1.11.7)
Zope Web Application Server Other Vulnerability (CVE-2002-0687)
MySQL CVE-2017-3463 Vulnerability (CVE-2017-3463)
WordPress Plugin Job Board by BestWebSoft Cross-Site Scripting (1.0.0)