CVE-2026-11855

Summary

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.

Affected Software

VendorProductVersion RangeStatus
UnknownSimple Membership0 < 4.7.5affected

Weaknesses

  • CWE-79 Cross-Site Scripting (XSS)

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: total

References