Security Advisory
CVE-2026-11855
8.8
HIGH
Vulnerability Description
The Simple Membership WordPress plugin before 4.7.5 does not verify the authenticity of Stripe webhook requests when no signing secret is configured, nor escape a value taken from them before outputting it in an administrator notice, allowing unauthenticated attackers to inject arbitrary web scripts that execute in the context of a logged-in administrator.
Published Date
July 6, 2026
Official Source
NIST NVD Advisory