{"id":"CVE-2026-86823","aliases":["EUVD-2026-80206","GHSA-xhvp-v8j9-2mrf"],"status":"published","title":"Newsletter \u003c 9.3.7 - Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu Parameter","description":"The Newsletter  WordPress plugin before 9.3.7 does not validate the destination of the redirect performed after a public subscription action, allowing unauthenticated attackers to redirect users to arbitrary external sites and to disclose a subscriber token that grants access to that subscriber record's front-end actions.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00323,"percentile":0.25616,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-601"],"published":"2026-09-16T06:00:16Z","modified":"2026-09-17T15:33:22Z","products":[{"vendor":"stefano lissa","product":"newsletter"},{"vendor":"unknown","product":"newsletter"}],"references":[{"url":"https://wpscan.com/vulnerability/2db98679-24ca-494e-a8fd-f6417a0f1ea8/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86823"},{"url":"https://wpscan.com/vulnerability/2db98679-24ca-494e-a8fd-f6417a0f1ea8"},{"url":"https://github.com/advisories/GHSA-xhvp-v8j9-2mrf"}],"sources":{"cve":[{"id":"CVE-2026-86823","title":"Newsletter \u003c 9.3.7 - Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu Parameter","description":"The Newsletter  WordPress plugin before 9.3.7 does not validate the destination of the redirect performed after a public subscription action, allowing unauthenticated attackers to redirect users to arbitrary external sites and to disclose a subscriber token that grants access to that subscriber record's front-end actions.","status":"published","published":"2026-09-16T06:00:16.296Z","modified":"2026-09-17T12:33:42.412Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T13:49:42.666099Z"}],"euvd":[{"id":"EUVD-2026-80206","description":"The Newsletter  WordPress plugin before 9.3.7 does not validate the destination of the redirect performed after a public subscription action, allowing unauthenticated attackers to redirect users to arbitrary external sites and to disclose a subscriber token that grants access to that subscriber record's front-end actions.","status":"published","published":"2026-09-16T06:00:16Z","modified":"2026-09-17T12:33:42Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T17:28:13.536818Z"}],"ghsa":[{"id":"GHSA-xhvp-v8j9-2mrf","title":"The Newsletter  WordPress plugin before 9.3.7 does not validate the destination of the redirect...","description":"The Newsletter  WordPress plugin before 9.3.7 does not validate the destination of the redirect performed after a public subscription action, allowing unauthenticated attackers to redirect users to arbitrary external sites and to disclose a subscriber token that grants access to that subscriber record's front-end actions.","status":"published","published":"2026-09-16T06:31:36Z","modified":"2026-09-17T15:33:22Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T15:12:05.417571Z"}],"nvd":[{"id":"CVE-2026-86823","description":"The Newsletter  WordPress plugin before 9.3.7 does not validate the destination of the redirect performed after a public subscription action, allowing unauthenticated attackers to redirect users to arbitrary external sites and to disclose a subscriber token that grants access to that subscriber record's front-end actions.","status":"published","published":"2026-09-16T06:16:35.043Z","modified":"2026-09-17T13:16:54.037Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:12:48.287983Z"}]}}