Briefing

Ultimate Member Plugin Vulnerability Allows Password Reset Link Disclosure

security
by Roger Montti · WordPress

Patch Ultimate Member to version 2.12.0 immediately to close password reset link disclosure vulnerability.

What to do now

Patch Ultimate Member to version 2.12.0 immediately to close password reset link disclosure vulnerability.

Summary

Ultimate Member, a popular WordPress membership plugin, has a critical vulnerability that allows authenticated contributors or higher to obtain password reset URLs for any user, including administrators. The flaw exists in all versions up to 2.11.4 and is caused by three logic errors: treating arbitrary posts as member directories, bypassing protected metadata restrictions, and failing to validate field names when generating user card data. Password reset links are temporary credentials that can be used to reset any account’s password, effectively enabling full account takeover. The vulnerability was rated 8.8/10 and could affect up to 200,000 WordPress installations. A patch is available in version 2.12.0, which adds stricter validation around member directory handling and allowed user data fields. Site owners using Ultimate Member should update immediately to version 2.12.0 or newer to close the exploit. Failure to patch could allow attackers to compromise admin accounts and gain full control of the site. The issue underscores the importance of keeping membership plugins up to date and monitoring for authenticated‑level access risks.

Key changes

  • Vulnerability in Ultimate Member up to 2.11.4 allows password reset URLs for any user.
  • Authenticated contributor-level or higher can exploit the flaw.
  • Three logic errors: arbitrary posts as member directories, bypassing metadata restrictions, missing field validation.
  • Password reset links are temporary credentials enabling account takeover.
  • Vulnerability rated 8.8/10 and could affect up to 200,000 installations.
  • Patch available in version 2.12.0 with stricter validation.
  • Update to 2.12.0 or newer immediately recommended.
  • Failure to patch risks admin account compromise and full site control.

Affects

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Customer impact

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