matrix-react-sdk is 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). Since the Export Chat feature generates a separate document, an attacker can only inject code run from the `null` origin, restricting the impact. However, the attacker can still potentially use the XSS to leak message contents. A malicious homeserver is a potential attacker since the affected inputs are controllable server-side. This issue has been addressed in commit `22fcd34c60` which is included in release version 3.76.0. Users are advised to upgrade. The only known workaround for this issue is to disable or to not use the Export Chat feature.
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Fri, 18 Oct 2024 18:15:00 +0000
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2023-07-18T16:59:21.659Z
Updated: 2024-10-18T17:24:35.910Z
Reserved: 2023-06-29T19:35:26.436Z
Link: CVE-2023-37259
Vulnrichment
Updated: 2024-08-02T17:09:33.537Z
NVD
Status : Modified
Published: 2023-07-18T17:15:11.490
Modified: 2024-11-21T08:11:19.710
Link: CVE-2023-37259
Redhat
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