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CVE-2024-31208

Synapse's V2 state resolution weakness allows DoS from remote room members

Published: Apr 23, 2024Updated: Aug 26, 2025 Sources: CVE List NVD GHSACWE-770
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
1.5%
Top 29.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Synapse V2 state resolution weakness allows Denial of Service (DoS)

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-770

Affected Products

matrix-synapsePyPIOSS Libraries
synapsematrix
On-premWeb App
Communications / messaging-chat
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
synapseelement-hq
Mixed
Communications / messaging-chat
pypipackage-ecosystemOSS Libraries
matrixoss-projectGBCommunicationsaka synapse, matrix irc bridge, javascript sdk
fedoraprojectoss-projectUSOperating Systemsaka fedora project
element-hqoss-projectCommunications

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v
github.com
https://nvd.nist.gov/vuln/detail/CVE-2024-31208
nvd.nist.gov
https://github.com/element-hq/synapse/commit/55b0aa847a61774b6a3acdc4b177a20dc019f01a
github.com
and 9 more references View all →

Timeline

Published
Apr 23, 2024
Last Updated
Aug 26, 2025

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