What’s Vulnerable › Vulnerabilities
CVE-2026-15931: Simple Membership < 4.7.8 - Unauthenticated Stored XSS via PayPal Subscription Subscriber Name
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-03 · updated 2026-08-26
- Weakness: CWE-79
Description
The Simple Membership WordPress plugin before 4.7.8 does not sanitise a subscriber name value received from an unauthenticated payment approval request, nor escape it when displaying it in the administration dashboard, allowing unauthenticated attackers to store arbitrary JavaScript that executes in an administrator's session.
Affected products
- Simple Membership: before 4.7.8 — fixed in 4.7.8
How to fix
Upgrade to a fixed version: Simple Membership 4.7.8. Check the vendor advisory for mitigations.
References
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