{"id":"CVE-2026-16268","aliases":["EUVD-2026-53723","GHSA-mhrm-79mh-vhfj"],"status":"published","title":"Newsletters \u003c 4.16 - Unauthenticated Server-Side Request Forgery via SNS Bounce Handler","description":"The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00733,"percentile":0.5483,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-918"],"published":"2026-08-06T06:00:09Z","modified":"2026-08-26T16:31:16Z","exploits":[{"source":"nuclei","id":"CVE-2026-16268","title":"Newsletters \u003c 4.16 - Unauthenticated SSRF via SNS Bounce Handler","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-16268.yaml"}],"products":[{"vendor":"tribulant software","product":"newsletters"},{"vendor":"unknown","product":"newsletters"}],"references":[{"url":"https://wpscan.com/vulnerability/65612dd4-83d8-40c5-8e12-862e9b5f940b/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16268"},{"url":"https://wpscan.com/vulnerability/65612dd4-83d8-40c5-8e12-862e9b5f940b"},{"url":"https://github.com/advisories/GHSA-mhrm-79mh-vhfj"}],"sources":{"cve":[{"id":"CVE-2026-16268","title":"Newsletters \u003c 4.16 - Unauthenticated Server-Side Request Forgery via SNS Bounce Handler","description":"The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts.","status":"published","published":"2026-08-06T06:00:09.742Z","modified":"2026-08-06T14:08:39.333Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:20:10.870108Z"}],"euvd":[{"id":"EUVD-2026-53723","description":"The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts.","status":"published","published":"2026-08-06T06:00:09Z","modified":"2026-08-06T14:08:39Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T18:02:08.553271Z"}],"ghsa":[{"id":"GHSA-mhrm-79mh-vhfj","title":"The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce...","description":"The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts.","status":"published","published":"2026-08-06T09:30:29Z","modified":"2026-08-06T15:33:40Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","level":"high"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T15:10:09.761462Z"}],"nvd":[{"id":"CVE-2026-16268","description":"The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts.","status":"published","published":"2026-08-06T07:16:28.3Z","modified":"2026-08-26T16:31:16.753Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:12:35.031043Z"}]}}