CVSS 3.1 Score 4.3 of 10 (medium)


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


CVE-2023-42453 is a vulnerability that affects Synapse, an open-source Matrix homeserver developed by the 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.


Explore Beyond the CVE Basics with Recorded Future's Vulnerability Intelligence

Note: This is just a basic overview providing quick insights into CVE-2023-42453 information. Gain full access to comprehensive CVE data, risk scores, prioritization, and mitigation data through Recorded Future's Vulnerability Intelligence:
  • Prioritize with Risk-Based Scoring
  • Explore the Extensive Vulnerability Database
  • Receive Early Alerts on Emerging CVEs
  • Focus on Critical Exploitable Vulnerabilities
  • Streamline Remediation with Integration Options