CVE-2026-11855
Simple Membership < 4.7.5 - Unauthenticated Stored XSS via Stripe Webhook API Version
- State
- Published
- Severity
- 8.8 High
- Published
- Jul 6, 2026
- Updated
- Jul 6, 2026
- Reserved
- Jun 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
Simple MembershipUnknown |
|
References
- https://wpscan.com/vulnerability/217cb606-a0f2-4427-9262-cfe1cc90474e/exploitvdb-entrytechnical-description
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