{"id":"CVE-2026-91831","state":"PUBLISHED","title":"Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting","description":"The Subscribe to Comments WordPress plugin before 2.3.3 does not sanitise newline characters from a notification sender-name setting before using it in e-mail headers, allowing users with Author-level access and above to inject arbitrary e-mail headers, such as a hidden Bcc, and to spoof the sender.","publishedAt":"2026-10-19T06:46:17.280Z","updatedAt":"2026-10-19T09:31:21.214Z","severity":{"score":3.8,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N","source":"WPScan"},"assigner":"WPScan","products":["Unknown Subscribe to Comments"],"affected":[{"vendor":"Unknown","product":"Subscribe to Comments","defaultStatus":"unaffected","versions":[{"version":"2.3","status":"affected","lessThan":"2.3.3","versionType":"semver"}],"collectionURL":"https://wordpress.org/plugins"}],"references":["https://wpscan.com/vulnerability/6cd60f78-f5e2-4b4a-8d50-7d2bc4f981ee/"],"weaknesses":["CWE-93"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/91xxx/CVE-2026-91831.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-91831","state":"PUBLISHED","datePublished":"2026-10-19T06:46:17.280Z","dateUpdated":"2026-10-19T09:31:21.214Z","assignerShortName":"WPScan","assignerOrgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateReserved":"2026-09-15T08:14:21.129Z"},"containers":{"cna":{"title":"Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting","descriptions":[{"lang":"en","value":"The Subscribe to Comments WordPress plugin before 2.3.3 does not sanitise newline characters from a notification sender-name setting before using it in e-mail headers, allowing users with Author-level access and above to inject arbitrary e-mail headers, such as a hidden Bcc, and to spoof the sender."}],"affected":[{"vendor":"Unknown","product":"Subscribe to Comments","defaultStatus":"unaffected","versions":[{"version":"2.3","status":"affected","lessThan":"2.3.3","versionType":"semver"}],"collectionURL":"https://wordpress.org/plugins"}],"references":[{"url":"https://wpscan.com/vulnerability/6cd60f78-f5e2-4b4a-8d50-7d2bc4f981ee/","tags":["exploit","vdb-entry","technical-description"]}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N","baseScore":3.8,"baseSeverity":"LOW"}}],"problemTypes":[{"descriptions":[{"description":"CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"WPScan","orgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateUpdated":"2026-10-19T06:46:17.280Z"},"credits":[{"lang":"en","value":"Het Kalariya","type":"finder"},{"lang":"en","value":"WPScan","type":"coordinator"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"WPScan CVE Generator"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-91831","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-19T09:25:57.636205Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-93","lang":"en","type":"CWE","description":"CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T09:31:21.214Z"}}]}}}