{"id":"CVE-2026-16264","aliases":["EUVD-2026-85021","GHSA-q3j5-fxpp-r5pf"],"status":"published","title":"Newsletters \u003c 4.18.1 - Unauthenticated Subscriber Record Overwrite and PII Disclosure via IDOR","description":"The Newsletters WordPress plugin before 4.18.1 does not perform an ownership check on some of its subscriber management actions, and issues a management session to unauthenticated visitors on request, allowing attackers to read any subscriber's personal data and overwrite any subscriber's record including their email address.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00266,"percentile":0.1866,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-639"],"published":"2026-09-23T06:00:14Z","modified":"2026-09-23T18:13:31Z","products":[{"vendor":"tribulant software","product":"newsletters"},{"vendor":"unknown","product":"newsletters"}],"references":[{"url":"https://wpscan.com/vulnerability/0dd1de2d-e9bb-4c42-a78b-2643d43dfed6/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16264"},{"url":"https://wpscan.com/vulnerability/0dd1de2d-e9bb-4c42-a78b-2643d43dfed6"},{"url":"https://github.com/advisories/GHSA-q3j5-fxpp-r5pf"}],"sources":{"cve":[{"id":"CVE-2026-16264","title":"Newsletters \u003c 4.18.1 - Unauthenticated Subscriber Record Overwrite and PII Disclosure via IDOR","description":"The Newsletters WordPress plugin before 4.18.1 does not perform an ownership check on some of its subscriber management actions, and issues a management session to unauthenticated visitors on request, allowing attackers to read any subscriber's personal data and overwrite any subscriber's record including their email address.","status":"published","published":"2026-09-23T06:00:14.541Z","modified":"2026-09-23T11:01:05.173Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:20:10.870108Z"}],"euvd":[{"id":"EUVD-2026-85021","description":"The Newsletters WordPress plugin before 4.18.1 does not perform an ownership check on some of its subscriber management actions, and issues a management session to unauthenticated visitors on request, allowing attackers to read any subscriber's personal data and overwrite any subscriber's record including their email address.","status":"published","published":"2026-09-23T06:00:14Z","modified":"2026-09-23T11:01:05Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T17:28:01.283316Z"}],"ghsa":[{"id":"GHSA-q3j5-fxpp-r5pf","title":"The Newsletters WordPress plugin before 4.18.1 does not perform an ownership check on some of its...","description":"The Newsletters WordPress plugin before 4.18.1 does not perform an ownership check on some of its subscriber management actions, and issues a management session to unauthenticated visitors on request, allowing attackers to read any subscriber's personal data and overwrite any subscriber's record including their email address.","status":"published","published":"2026-09-23T06:31:02Z","modified":"2026-09-23T12:31:10Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:12:19.869437Z"}],"nvd":[{"id":"CVE-2026-16264","description":"The Newsletters WordPress plugin before 4.18.1 does not perform an ownership check on some of its subscriber management actions, and issues a management session to unauthenticated visitors on request, allowing attackers to read any subscriber's personal data and overwrite any subscriber's record including their email address.","status":"published","published":"2026-09-23T06:17:00.963Z","modified":"2026-09-23T18:13:31.21Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:12:50.703874Z"}]}}