{"id":"CVE-2026-86406","state":"PUBLISHED","title":"User Registration & Membership < 5.2.8 - Subscriber+ Privilege Escalation via Membership Purchase","description":"The User Registration & Membership  WordPress plugin before 5.2.8 does not check the capability of the user making a membership purchase, and does not validate the payment method or the plan submitted with it, allowing any authenticated user such as a subscriber to be granted the WordPress role attached to a paid plan without paying for it. Where the site owner has mapped a plan to a privileged role, this leads to privilege escalation up to administrator.","publishedAt":"2026-09-13T06:00:08.312Z","updatedAt":"2026-09-13T10:45:23.160Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"WPScan","products":["Unknown User Registration & Membership"],"affected":[{"vendor":"Unknown","product":"User Registration & Membership","defaultStatus":"unaffected","versions":[{"version":"4.4.6","status":"affected","lessThan":"5.2.8","versionType":"semver"}]}],"references":["https://wpscan.com/vulnerability/0fb4ec40-3f92-4c7e-8877-8898b355d78d/"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/86xxx/CVE-2026-86406.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-86406","state":"PUBLISHED","datePublished":"2026-09-13T06:00:08.312Z","dateUpdated":"2026-09-13T10:45:23.160Z","assignerShortName":"WPScan","assignerOrgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateReserved":"2026-09-07T12:04:24.688Z"},"containers":{"cna":{"title":"User Registration & Membership < 5.2.8 - Subscriber+ Privilege Escalation via Membership Purchase","descriptions":[{"lang":"en","value":"The User Registration & Membership  WordPress plugin before 5.2.8 does not check the capability of the user making a membership purchase, and does not validate the payment method or the plan submitted with it, allowing any authenticated user such as a subscriber to be granted the WordPress role attached to a paid plan without paying for it. Where the site owner has mapped a plan to a privileged role, this leads to privilege escalation up to administrator."}],"affected":[{"vendor":"Unknown","product":"User Registration & Membership","defaultStatus":"unaffected","versions":[{"version":"4.4.6","status":"affected","lessThan":"5.2.8","versionType":"semver"}]}],"references":[{"url":"https://wpscan.com/vulnerability/0fb4ec40-3f92-4c7e-8877-8898b355d78d/","tags":["exploit","vdb-entry","technical-description"]}],"problemTypes":[{"descriptions":[{"description":"CWE-269 Improper Privilege Management","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"WPScan","orgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateUpdated":"2026-09-13T06:00:08.312Z"},"credits":[{"lang":"en","value":"Karthik Ramakrishnan","type":"finder"},{"lang":"en","value":"WPScan","type":"coordinator"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"WPScan CVE Generator"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-13T10:42:44.062470Z","id":"CVE-2026-86406","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","type":"CWE","lang":"en","description":"CWE-269 Improper Privilege Management"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-13T10:45:23.160Z"}}]}}}