CVE-2024-52815CWE-20

Synapse allows a a malformed invite to break the invitee's `/sync`

High · published December 3, 2024

CVSS v4.0
8.7
EPSS
1%
Percentile
46.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
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
EPSS
0.00570 · 46.5th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2024-12-03T16:58Z
EPSS history
Timeline
  • 03 DEC 16:58Z
    Synapse allows a a malformed invite to break the invitee's `/sync`
    cvelistv5