CVE-2025-68667 (GCVE-0-2025-68667)
Vulnerability from cvelistv5
Published
2025-12-23 22:45
Modified
2025-12-24 14:51
Severity ?
9.9 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:L/SA:L
CWE
  • CWE-20 - Improper Input Validation
  • CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Summary
continuwuity is a Matrix homeserver written in Rust. Prior to version 0.5.0, this vulnerability allows a remote, unauthenticated attacker to force the target server to cryptographically sign arbitrary membership events. The flaw exists because the server fails to validate the origin of a signing request, provided the event's state_key is a valid user ID belonging to the target server. This issue has been patched in version 0.5.0. A workaround for this issue involves blocking access to the PUT /_matrix/federation/v2/invite/{roomId}/{eventId} endpoint using the reverse proxy.
References
Impacted products
Vendor Product Version
continuwuity continuwuity Version: < 0.5.0
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