CVSS Score of 10 (low)


Published Jul 18, 2023
Updated: Jul 27, 2023


CVE-2023-37259 is a vulnerability in matrix-react-sdk, a react-based SDK for inserting a Matrix chat/voip client into a web page. The Export Chat feature includes certain attacker-controlled elements in the generated document without sufficient escaping, leading to stored Cross-site scripting (XSS). This vulnerability can be exploited by a malicious homeserver to potentially leak message contents. The issue has been addressed in commit `22fcd34c60` and users are advised to upgrade to release version 3.76.0. The only known workaround is to disable or not use the Export Chat feature.

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