CVE-2024-52815 HIGH

CVE-2024-52815: Synapse allows a a malformed invite to break the invitee's `/sync`

Vendor Element-Hq
Product synapse
Weakness CWE-20 · Input validation
Published December 3, 2024
Last update December 3, 2024
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 3, 2024 CVE published
December 3, 2024 Record updated