{"schemaVersion":3,"id":"CVE-2026-86406","aliases":[],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2026-09-13T06:00:08.312Z","modified":"2026-09-13T10:45:23.160Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"wordfence","score":6.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00323,"percentile":0.2383,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.13299999999999998,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.0019},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00323,"percentile":0.2383}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00323,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00323,"percentile":0.2383}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_27E33DC23D3C81E4","name":"Exploit Reference (wpscan.com)","source":"reference","url":"https://wpscan.com/vulnerability/0fb4ec40-3f92-4c7e-8877-8898b355d78d/","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-269","name":"Improper Privilege Management","description":"The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/269.html"}],"affected":[{"vendor":"unknown","product":"user registration & membership","name":"User Registration & Membership","label":"user registration & membership","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.4.6, < 5.2.8","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.4.6, < 5.2.8","eol":null,"hubHref":"/vendor/unknown/user_registration__membership"},{"vendor":"wordpress","product":"user-registration","name":"User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder","label":"user-registration","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.4.6, ≤ 5.2.7 (fixed in 5.2.8)","noFixRecorded":false,"fixedIn":"5.2.8"}],"versionsText":"≥ 4.4.6, ≤ 5.2.7 (fixed in 5.2.8)","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://wpscan.com/vulnerability/0fb4ec40-3f92-4c7e-8877-8898b355d78d/","label":"wpscan.com/vulnerability/0fb4ec40-3f92-4c7e-8877-8898b355d78d/","hostname":"wpscan.com","tags":["Exploit","VDB Entry","Technical Description"]},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/ae8c1d8e-8a87-4dd8-b7f5-c6655d3f6451","label":"www.wordfence.com/threat-intel/vulnerabilities/id/ae8c1d8e-8a87-4dd8-b7f5-c6655d3f6451","hostname":"www.wordfence.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-13T06:00:08.312Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-13T10:45:23.160Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":40,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T19:28:44.892Z","stale":false,"partial":false}}