6.5

CVE-2022-39374: matrix-org synapse Uncontrolled Resource Consumption

CVSS: 6.5v3.0MediumModified
AliasesGHSA-p9qp-c452-f9r7PYSEC-2023-66UBUNTU-CVE-2022-39374
Published 26-05-2023Last modified 13-02-2025
Open JSON

Vulnerability summary

CVE-2022-39374 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in matrix-org synapse. EPSS estimates a 0.94% chance of exploitation in the next 30 days, higher than 60.3% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.0 (CVE.org)
EPSS score
0.94%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
USN-7444-1

Timeline

  1. 26-05-2023
    PublishedVulnerability first disclosed.
  2. 13-02-2025
    Last modifiedVulnerability information updated.

Description

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the same room, the malicious homeserver can trick Synapse into accepting previously rejected events into its view of the current state of that room. This can be exploited in a way that causes all further messages and state changes sent in that room from the vulnerable homeserver to be rejected. This issue has been patched in version 1.68.0

CVSS metrics

8 scores · 5 sources · 3 versions

EPSS trend

Probability

0.94%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

0.00 pp

From 0.94% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.94%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • matrix-synapse< 1.68.0-1
Matrix1 product
Matrix-org1 product
PyPI1 product
  • matrix-synapse≥ 1.62.0, < 1.68.0rc1 | ≥ 1.62.0, < 1.68.0
Ubuntu1 product
  • matrix-synapse< 1.11.0-1ubuntu0.1~esm2 | < 1.53.0-1ubuntu0.1~esm2

5 vendors · 5 products

References

13 links
Show all 13 references