{"id":"CVE-2026-16267","aliases":["EUVD-2026-54729","GHSA-jxc3-pfg8-hv86"],"status":"published","title":"Newsletters \u003c 4.16 - Unauthenticated PHP Object Injection via Date Form Field","description":"The Newsletters WordPress plugin before 4.16 does not restrict the classes allowed when unserialising a value taken from a public form submission, allowing unauthenticated attackers to inject arbitrary PHP objects.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00453,"percentile":0.39656,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-502"],"published":"2026-08-08T06:00:10Z","modified":"2026-08-26T16:31:16Z","products":[{"vendor":"tribulant software","product":"newsletters"},{"vendor":"unknown","product":"newsletters"}],"references":[{"url":"https://wpscan.com/vulnerability/b51c11d6-5bfa-4b2c-b348-cda19889deee/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16267"},{"url":"https://wpscan.com/vulnerability/b51c11d6-5bfa-4b2c-b348-cda19889deee"},{"url":"https://github.com/advisories/GHSA-jxc3-pfg8-hv86"}],"sources":{"cve":[{"id":"CVE-2026-16267","title":"Newsletters \u003c 4.16 - Unauthenticated PHP Object Injection via Date Form Field","description":"The Newsletters WordPress plugin before 4.16 does not restrict the classes allowed when unserialising a value taken from a public form submission, allowing unauthenticated attackers to inject arbitrary PHP objects.","status":"published","published":"2026-08-08T06:00:10.538Z","modified":"2026-08-11T19:32:29.821Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:20:10.870108Z"}],"euvd":[{"id":"EUVD-2026-54729","description":"The Newsletters WordPress plugin before 4.16 does not restrict the classes allowed when unserialising a value taken from a public form submission, allowing unauthenticated attackers to inject arbitrary PHP objects.","status":"published","published":"2026-08-08T06:00:10Z","modified":"2026-08-11T19:32:29Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:01:59.481615Z"}],"ghsa":[{"id":"GHSA-jxc3-pfg8-hv86","title":"The Newsletters WordPress plugin before 4.16 does not restrict the classes allowed when...","description":"The Newsletters WordPress plugin before 4.16 does not restrict the classes allowed when unserialising a value taken from a public form submission, allowing unauthenticated attackers to inject arbitrary PHP objects.","status":"published","published":"2026-08-08T09:30:20Z","modified":"2026-08-11T21:32:28Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:10:21.509652Z"}],"nvd":[{"id":"CVE-2026-16267","description":"The Newsletters WordPress plugin before 4.16 does not restrict the classes allowed when unserialising a value taken from a public form submission, allowing unauthenticated attackers to inject arbitrary PHP objects.","status":"published","published":"2026-08-08T07:17:09.667Z","modified":"2026-08-26T16:31:16.753Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:12:35.743275Z"}]}}