Auth bypass in Paid Membership Subscriptions

CVE-2026-90951

The Paid Membership Subscriptions WordPress plugin before 3.1.0 does not bind one of its unauthenticated payment actions to the requesting user, allowing someone who holds another member's in-flight payment identifier to delete that member's checkout state.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (15.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-90951: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001

Affected products

  • Paid Membership Subscriptions

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-90951?
CVE-2026-90951 is a low-severity vulnerability in Paid Membership Subscriptions, classified under Incorrect Authorization. CVSS score: 3.7/10. Published 2026-09-23.
How severe is CVE-2026-90951?
Low severity. CVSS v3 base score is 3.7 out of 10.