CVE-2025-61672

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Source
https://cve.org/CVERecord?id=CVE-2025-61672
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-61672.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-61672
Aliases
Downstream
Related
Published
2025-10-08T14:55:06.378Z
Modified
2026-04-10T05:32:41.211943Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Synapse: Invalid device keys degrade federation functionality
Details

Synapse is an open source Matrix homeserver implementation. Lack of validation for device keys in Synapse before 1.138.3 and in Synapse 1.139.0 allow an attacker registered on the victim homeserver to degrade federation functionality, unpredictably breaking outbound federation to other homeservers. The issue is patched in Synapse 1.138.3, 1.138.4, 1.139.1, and 1.139.2. Note that even though 1.138.3 and 1.139.1 fix the vulnerability, they inadvertently introduced an unrelated regression. For this reason, the maintainers of Synapse recommend skipping these releases and upgrading straight to 1.138.4 and 1.139.2.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/61xxx/CVE-2025-61672.json",
    "cwe_ids": [
        "CWE-1287"
    ]
}
References

Affected packages

Git / github.com/element-hq/synapse

Affected ranges

Type
GIT
Repo
https://github.com/element-hq/synapse
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
527e831b61bcf04106b6338b53048ec3986be7c0

Affected versions

Other
hhs-1
hhs-2
hhs-3
hhs-5
hhs-6
hhs-7
hhs-8
v0.*
v0.10.0
v0.10.0-r1
v0.10.0-r2
v0.11.0
v0.11.0-r1
v0.11.0-r2
v0.11.1
v0.12.0
v0.13.1
v0.13.2
v0.13.3
v0.14.0
v0.16.0
v0.16.1
v0.16.1-r1
v0.17.0
v0.17.1
v0.17.2
v0.17.3
v0.18.0
v0.18.1
v0.18.2
v0.18.3
v0.18.4
v0.18.5
v0.2.0
v0.2.1
v0.2.1a
v0.2.2
v0.23.0-rc1
v0.23.0-rc2
v0.25.0-rc1
v0.28.0-rc1
v0.3.0
v0.3.3
v0.3.4
v0.32.0
v0.32.0rc1
v0.32.2
v0.4.1
v0.4.2
v0.5.0
v0.5.1
v0.5.2
v0.5.3
v0.5.3a
v0.5.3b
v0.5.3c
v0.5.4
v0.5.4a
v0.6.0
v0.6.0a
v0.6.0b
v0.6.1
v0.6.1a
v0.6.1b
v0.6.1c
v0.6.1d
v0.6.1e
v0.6.1f
v0.7.0
v0.7.0a
v0.7.0b
v0.7.0c
v0.7.0d
v0.7.0e
v0.7.0f
v0.7.1
v0.7.1-r1
v0.7.1-r2
v0.7.1-r3
v0.7.1-r4
v0.8.0
v0.8.1
v0.8.1-r1
v0.8.1-r2
v0.8.1-r3
v0.8.1-r4
v0.9.0
v0.9.0-r1
v0.9.0-r2
v0.9.0-r3
v0.9.0-r4
v0.9.0-r5
v0.9.1
v0.9.2
v0.9.2-r1
v0.9.2-r2
v0.9.3
v0.99.1rc1
v0.99.2rc1
v0.99.4rc1
v0.99.5.1.dev0
v1.*
v1.1.0rc1
v1.1.0rc2
v1.10.0rc1
v1.100.0rc1
v1.100.0rc2
v1.100.0rc3
v1.101.0rc1
v1.103.0rc1
v1.104.0rc1
v1.105.0rc1
v1.106.0rc1
v1.11.0rc1
v1.111.0rc1
v1.112.0rc1
v1.114.0rc1
v1.115.0rc1
v1.116.0rc1
v1.12.0rc1
v1.121.0rc1
v1.123.0rc1
v1.124.0rc1
v1.126.0rc1
v1.126.0rc2
v1.126.0rc3
v1.127.0rc1
v1.128.0rc1
v1.130.0rc1
v1.133.0rc1
v1.135.0rc1
v1.136.0rc1
v1.137.0rc1
v1.138.0
v1.138.0rc1
v1.138.1
v1.138.2
v1.14.0rc1
v1.15.0rc1
v1.16.0rc1
v1.17.0rc1
v1.18.0rc1
v1.23.0rc1
v1.24.0rc1
v1.27.0rc1
v1.29.0rc1
v1.3.0rc1
v1.30.0rc1
v1.31.0rc1
v1.32.0rc1
v1.34.0rc1
v1.35.0rc1
v1.36.0rc1
v1.4.0rc1
v1.40.0rc1
v1.49.0rc1
v1.5.0rc1
v1.52.0rc1
v1.6.0rc1
v1.62.0rc1
v1.63.0rc1
v1.75.0rc1
v1.76.0rc1
v1.78.0rc1
v1.79.0rc1
v1.8.0rc1
v1.81.0rc1
v1.84.0rc1
v1.87.0rc1
v1.88.0rc1
v1.9.0.dev1
v1.9.0.dev2
v1.9.0rc1
v1.90.0rc1
v1.94.0rc1
v1.95.0rc1
v1.98.0rc1
v1.99.0rc1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-61672.json"