CVE-2025-30355

Synapse vulnerable to federation denial of service via malformed events

CVSS 7.1 HIGHEPSS 1.1%CWE-20

Vexday Risk Score

21Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 7.1EPSS 1.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

27 mar 2025Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

Synapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known workarounds are available.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Produtos afetados

element-hq · synapse

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Referências

https://github.com/element-hq/synapse/commit/2277df2a1eb685f85040ef98fa21d41aa4cdd389 https://github.com/element-hq/synapse/releases/tag/v1.127.1 https://github.com/element-hq/synapse/security/advisories/GHSA-v56r-hwv5-mxg6