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.)
                
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References
        History
                    No history.
 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: mitre
Published: 2020-09-27T20:31:44
Updated: 2024-08-04T15:40:36.947Z
Reserved: 2020-09-23T00:00:00
Link: CVE-2020-25828
 Vulnrichment
                        Vulnrichment
                    No data.
 NVD
                        NVD
                    Status : Modified
Published: 2020-09-27T21:15:12.877
Modified: 2024-11-21T05:18:51.293
Link: CVE-2020-25828
 Redhat
                        Redhat