CVE-2026-86407 User Registration & Membership < 5.2.8 - Unauthenticated User Data Disclosure via Membership Thank You Page
Unauthenticated attackers can retrieve sensitive user data from the membership confirmation page if specific smart tags are configured.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86407?
CVE-2026-86407 is a low-severity vulnerability in Unknown User Registration & Membership, published on 13 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The User Registration & Membership WordPress plugin before 5.2.8 does not verify that the visitor requesting its membership confirmation page owns the account named in the request, nor that any registration or purchase has taken place, allowing unauthenticated users to retrieve another user's email address, profile fields, role and membership order details. Exploitation requires the site owner to have added a user smart tag to that page's configurable message, which the shipped default does not contain.
Weakness: CWE-200
Which versions are affected by CVE-2026-86407?
How do I fix CVE-2026-86407?
No fix has been published for CVE-2026-86407 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-86407 being exploited?
There is no known exploitation of CVE-2026-86407 in the wild and no public exploit code.
Sources
Also known as GHSA-wr2r-r9vc-rr7g.