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Missing Authentication for Critical Function

CVE-2025-55073

Medium
5.3/10

Summary

Mattermost versions 10.11.x through 10.11.3, 10.5.x through 10.5.11, 10.12.x through 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow, which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.

  • LOW
  • NETWORK
  • LOW
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • NONE

CWE-306 - Missing Authentication for Critical Function

The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

References

Advisory Timeline

  • Published