CVE-2024-52815: Synapse allows a a malformed invite to break the invitee's `/sync`
8.7
CVSS
Description
Synapse is an open-source Matrix homeserver. Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allows a malicious server to send a specially crafted invite that disrupts the invited user's /sync functionality. Synapse 1.120.1 rejects such invalid invites received over federation and restores the ability to sync for affected users.
Classification
CVE ID: CVE-2024-52815
CVSS Base Severity: HIGH
CVSS Base Score: 8.7
Affected Products
Vendor: element-hq
Product: synapse
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.04% (probability of being exploited)
EPSS Percentile: 11.44% (scored less or equal to compared to others)
EPSS Date: 2025-02-03 (when was this score calculated)