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Improper Access Control

CVE-2021-40347

Medium
5.4/10

Summary

An issue was discovered in "views/list.py" in GNU Mailman postorius versions prior to1.3.5. An attacker (logged into any account) can send a crafted POST request to unsubscribe any user from a mailing list, also revealing whether that address was subscribed in the first place.

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

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