{"id":"CVE-2026-86813","title":"The MetForm WordPress plugin before 4.1.9 does not properly neutralize newline characters in user-submitted values that are placed into notification email headers, allowing unauthenticated attackers to inject additional email headers, su…","summary":"The MetForm WordPress plugin before 4.1.9 does not properly neutralize newline characters in user-submitted values that are placed into notification email headers, allowing unauthenticated attackers to inject additional email headers, su…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-93"],"product":"MetForm","affected":["MetForm < 4.1.9"],"published":"2026-09-11","updated":"2026-09-11","sourceUpdated":"2026-09-11T17:35:21.440","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86813","references":[{"url":"https://wpscan.com/vulnerability/afda2a26-b965-42cb-85a8-4a4d83ec026e/","label":"contact@wpscan.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-11T12:05:38.615469Z"},"ingestedAt":"2026-09-11T16:45:47.922Z","epss":0.00243,"epssPercentile":0.13739,"slug":"CVE-2026-86813","body":"## Overview\n\nThe MetForm WordPress plugin before 4.1.9 does not properly neutralize newline characters in user-submitted values that are placed into notification email headers, allowing unauthenticated attackers to inject additional email headers, such as Bcc, into the emails the site sends when a submitted field value is configured to populate a header.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}