Groups <= 3.7.0 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary Group Join

Authorization Bypass Through User-Controlled Key
CVE CVE-2025-11748
CVSS Medium (4.3)
Publicly Published November 7, 2025
Last Updated November 11, 2025
Researcher shark3y
Description

The Groups plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.0 via the 'group_id' parameter of the group_join function due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Subscriber-level access and above, to register for groups other than ones set in the shortcode.

References

1 affected software package

Software Type Plugin
Software Slug groups (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 3.7.0
Patched Version
  • 3.8.0
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