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CVE-2024-52815

Medium

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.

SeverityMedium
CVSS5.3
Exploit probability—
ProductMatrix Synapse
PublishedDec 3, 2024
First seenDec 3, 2024
Weakness typeCWE-20Improper input validation

How to fix

Update
  • matrix synapse1.120.1 or later
  • matrix-synapse1.120.1 or later

Affected products

ProductAffected versionsFixed in
matrix synapsev < 1.120.11.120.1
matrix-synapsePyPIv < 1.120.11.120.1

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