VULNERABILITY INTELLIGENCE

CVE-2025-66622

CVSS score7.5 HIGH
EPSS probability0.41%
CISA KEVNot currently listed
Published2025-12-09
Last modified2026-10-07
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

matrix-sdk-base is the base component to build a Matrix client library. Versions 0.14.1 and prior are unable to handle responses that include custom m.room.join_rules values due to a serialization bug. This can be exploited to cause a denial-of-service condition, if a user is invited to a room with non-standard join rules, the crate's sync process will stall, preventing further processing for all rooms. This is fixed in version 0.16.0.

Weakness classification

  • security-advisories@github.com: CWE-755

Primary references