Read the docs
TI-2026-59121 Aliases CVE-2026-86406GHSA-23fc-j83w-rxq7

User Registration & Membership < 5.2.8 - Subscriber+ Privilege Escalation via Membership Purchase

Priority LOW 35CWE-269Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-269.

Summary

The User Registration & Membership WordPress plugin before 5.2.8 does not check the capability of the user making a membership purchase, and does not validate the payment method or the plan submitted with it, allowing any authenticated user such as a subscriber to be granted the WordPress role attached to a paid plan without paying for it. Where the site owner has mapped a plan to a privileged role, this leads to privilege escalation up to administrator.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00323 25th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed User Registration & Membership (Unknown): 5.2.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownUser Registration & Membership4.4.6 to before 5.2.85.2.8Patch availableCNA
  • User Registration & Membership VendorUnknown Affected 4.4.6 to before 5.2.8 Fixed in 5.2.8 Patch available CNA

Remediation

  • Fix · CNA User Registration & Membership (Unknown) Fixed in 5.2.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    User Registration & Membership 5.2.8

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-55340 User Registration & Membership < 5.2.8 - Author+ Privilege Escalation to AdministratorPriority LOW 34
    • TI-2026-55341 User Registration & Membership < 5.2.8 - Unauthenticated Open Redirect via Login Redirect ParametersPriority LOW 21
    • TI-2026-59122 User Registration & Membership < 5.2.8 - Unauthenticated User Data Disclosure via Membership Thank You PagePriority LOW 17
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86406
  2. 2026-10-03 Alias added: GHSA-23fc-j83w-rxq7

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences