CVE-2026-11855
Simple Membership < 4.7.5 - Unauthenticated Stored XSS via Stripe Webhook API Version
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.
INFO
Published Date :
July 6, 2026, 8:16 a.m.
Last Modified :
July 6, 2026, 9:10 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-11855
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the Simple Membership WordPress plugin to version 4.7.5.
- Configure a Stripe signing secret for webhook requests.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-11855.
| URL | Resource |
|---|---|
| https://wpscan.com/vulnerability/217cb606-a0f2-4427-9262-cfe1cc90474e/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-11855 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-11855
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-11855 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-11855 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 06, 2026
Action Type Old Value New Value Added Translation Title: el plugin de WordPress Simple Membership, Description: El plugin de WordPress Simple Membership, en versiones anteriores a la 4.7.5, no verifica la autenticidad de las solicitudes de webhook de Stripe cuando no se ha configurado ningún secreto de firma, ni escapa los valores extraídos de dichas solicitudes antes de mostrarlos en un aviso para el administrador, lo que permite a atacantes no autenticados inyectar scripts web arbitrarios que se ejecutan en el contexto de un administrador que ha iniciado sesión. -
New CVE Received by [email protected]
Jul. 06, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Unknown', 'product': 'Simple Membership', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '4.7.5', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added 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. Added Reference https://wpscan.com/vulnerability/217cb606-a0f2-4427-9262-cfe1cc90474e/