{"id":"CVE-2026-11855","aliases":["EUVD-2026-41820","GHSA-xmqj-cv3v-f292"],"status":"published","title":"Simple Membership \u003c 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.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00505,"percentile":0.43596,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2026-07-06T06:00:01Z","modified":"2026-07-06T18:37:01Z","products":[{"vendor":"unknown","product":"simple membership"},{"vendor":"wpinsider-1","product":"simple membership"}],"references":[{"url":"https://wpscan.com/vulnerability/217cb606-a0f2-4427-9262-cfe1cc90474e/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11855"},{"url":"https://wpscan.com/vulnerability/217cb606-a0f2-4427-9262-cfe1cc90474e"},{"url":"https://github.com/advisories/GHSA-xmqj-cv3v-f292"}],"sources":{"cve":[{"id":"CVE-2026-11855","title":"Simple Membership \u003c 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.","status":"published","published":"2026-07-06T06:00:01.657Z","modified":"2026-07-06T12:01:41.739Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"updated_at":"2026-11-02T14:20:04.809935Z"}],"euvd":[{"id":"EUVD-2026-41820","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.","status":"published","published":"2026-07-06T06:00:01Z","modified":"2026-07-06T12:01:41Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:20:13.541613Z"}],"ghsa":[{"id":"GHSA-xmqj-cv3v-f292","title":"The Simple Membership WordPress plugin before 4.7.5 does not verify the authenticity of Stripe...","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.","status":"published","published":"2026-07-06T09:30:26Z","modified":"2026-07-06T15:31:50Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:09:17.527527Z"}],"nvd":[{"id":"CVE-2026-11855","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.","status":"published","published":"2026-07-06T08:16:35.18Z","modified":"2026-07-06T18:37:01.22Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"updated_at":"2026-11-02T14:12:27.541515Z"}]}}