CVE-2025-30355
unknown
CVSS v3
—
CVSS v2
—
VIR risk
—
Description
Synapse vulnerable to federation denial of service via malformed events
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2025-30355
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | forky | fixed | 1.121.0-6 |
| debian | sid | fixed | 1.121.0-6 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | matrix-synapse | <1.127.1 | 1.127.1 |
References
- https://github.com/element-hq/synapse/security/advisories/GHSA-v56r-hwv5-mxg6
- https://nvd.nist.gov/vuln/detail/CVE-2025-30355
- https://github.com/element-hq/synapse/commit/2277df2a1eb685f85040ef98fa21d41aa4cdd389
- https://github.com/element-hq/synapse
- https://github.com/element-hq/synapse/releases/tag/v1.127.1
- https://security-tracker.debian.org/tracker/CVE-2025-30355
Verify integrity in audit chain (admin only). AS-IS.