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Vulnerability record · CVE-2026-11855 · published 6 July 2026

CVE-2026-11855: The Simple Membership WordPress plugin before 4.7.5 does not verify the authenticity of Stripe webhook request…

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.

8.8 CVSS 3.1 High EPSS 0.51% · top 59.3% Deferred
8.8CVSS 3.1 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
6 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
https://wpscan.com/vulnerability/217cb606-a0f2-4427-9262-cfe1cc90474e/

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Source: NIST National Vulnerability Database (record CVE-2026-11855), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.