CVE-2026-11855: high-severity vulnerability in Simple Membership
Simple Membership < 4.7.5 - Unauthenticated Stored XSS via Stripe Webhook API Version
Published
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.8epss 0.5%
exploitation probability
0.5%top 59% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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
Affected products
Unknown · Simple Membershippublic PoCs found — 1
cve_referencewpscan.com/vulnerability/217cb606-a0f2-4427-9262-cfe1cc90474e/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Simple Membership
In the same product, most dangerous first.
CVE-2022-1724—Simple Membership < 4.1.1 - Reflected Cross-Site ScriptingEPSS 1.8%CVE-2022-2317—Simple Membership < 4.1.3 - Unauthenticated Membership Privilege EscalationEPSS 1.4%CVE-2022-2273—Simple Membership < 4.1.3 - Membership Privilege EscalationEPSS 1.2%CVE-2022-4469MEDIUMSimple Membership < 4.2.2 - Contributor+ Stored XSSEPSS 0.5%CVE-2022-0681—Simple Membership < 4.1.0 - Arbitrary Transaction Deletion via CSRFEPSS 0.5%CVE-2022-0328—Simple Membership < 4.0.9 - Arbitrary Member Deletion via CSRFEPSS 0.5%