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Improper Access Control

CVE-2024-39361

Medium
5.4/10

Summary

Mattermost versions 9.5.0-rc1 through 9.5.6-rc1, 9.6.0-rc1 through 9.6.3-rc1, 9.7.0-rc1 through 9.7.5-rc1, 9.8.0-rc1 through 9.8.1-rc1, 9.9.0-rc1, and 9.9.0-rc2 fail to prevent users from specifying a "RemoteId" for their posts which allows an attacker to specify both a "remoteId" and the "post ID", resulting in creating a post with a user-defined "post ID". This can cause some broken functionality in the channel or thread with user-defined posts.

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

CWE-284 - Improper Access Control

Listed 5th in the 'OWASP Top Ten', improper (or broken) access control attacks are a fundamental type of vulnerability. This includes a broad range of design flaws that enable users to act outside of their intended permissions. They can use these privileges to gain access to restricted files and functionality such as accessing restricted information, falsifying records, destroying data, or executing commands.

References

Advisory Timeline

  • Published