CVE-2023-42453

CVSS 3.1 Score 4.3 of 10 (medium)

Details

Published Sep 27, 2023
Updated: Jan 7, 2024
CWE ID 285

Summary

CVE-2023-42453 is a vulnerability that affects Synapse, an open-source Matrix homeserver developed by the Matrix.org Foundation. The vulnerability allowed users to forge read receipts for any event by knowing the room ID and event ID, even if they were not in the room. This could lead to confusion as clients would display the event as read by the user. The issue has been fixed in version 1.93.0 of Synapse, and users are advised to upgrade to this version. There are no known workarounds for this vulnerability. The potential danger it poses to organizations is considered medium, with a base severity score of 4.3 out of 10, due to its ability to manipulate read receipts and cause confusion among users.

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