CVE-2025-61672
unknown
CVSS v3
—
CVSS v4 NEW
—
VIR risk
—
Description
Synapse's invalid device keys degrade federation functionality
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| sid | Fixed | 1.139.2-1 |
| forky | Fixed | 1.139.2-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | matrix-synapse | <1.138.3 | 1.138.3 |
| PyPI | matrix-synapse | >=1.139.0rc2,<1.139.1 | 1.139.1 |
References
- https://github.com/element-hq/synapse/security/advisories/GHSA-fh66-fcv5-jjfr
- https://nvd.nist.gov/vuln/detail/CVE-2025-61672
- https://github.com/element-hq/synapse/pull/17097
- https://github.com/element-hq/synapse/commit/26aaaf9e48fff80cf67a20c691c75d670034b3c1
- https://github.com/element-hq/synapse/commit/7069636c2d6d1ef2022287addf3ed8b919ef2740
- https://github.com/element-hq/synapse
- https://github.com/element-hq/synapse/releases/tag/v1.138.3
- https://github.com/element-hq/synapse/releases/tag/v1.138.4
- https://github.com/element-hq/synapse/releases/tag/v1.139.1
- https://github.com/element-hq/synapse/releases/tag/v1.139.2
- https://security-tracker.debian.org/tracker/CVE-2025-61672
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.