{"id":"CVE-2023-5770","state":"PUBLISHED","title":"HTML injection in email body through email subject","description":"Proofpoint Enterprise Protection contains a vulnerability in the email delivery agent that allows an unauthenticated attacker to inject improperly encoded HTML into the email body of a message through the email subject.  The vulnerability is caused by inappropriate encoding when rewriting the email before delivery.This issue affects Proofpoint Enterprise Protection: from 8.20.2 before patch 4809, from 8.20.0 before patch 4805, from 8.18.6 before patch 4804 and all other prior versions.\n\n","publishedAt":"2024-01-09T22:02:03.839Z","updatedAt":"2025-06-03T14:29:46.790Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","source":"Proofpoint"},"assigner":"Proofpoint","products":["Proofpoint Proofpoint Enterprise Protection"],"affected":[{"vendor":"Proofpoint","product":"Proofpoint Enterprise Protection","defaultStatus":"affected","versions":[{"version":"8.20.2","status":"affected","lessThan":"patch 4809","changes":[{"at":"patch 4809","status":"unaffected"}],"versionType":"semver"},{"version":"8.20.0","status":"affected","lessThan":"patch 4805","changes":[{"at":"patch 4805","status":"unaffected"}],"versionType":"semver"},{"version":"8.18.6","status":"affected","lessThan":"patch 4804","changes":[{"at":"patch 4804","status":"unaffected"}],"versionType":"semver"},{"version":"8.0","status":"affected","lessThan":"8.18.6","versionType":"semver"}],"modules":["Email Delivery Agent"]}],"references":["https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2023-0009"],"weaknesses":["CWE-838"],"ingestedAt":"2026-10-29T20:06:42.242Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/5xxx/CVE-2023-5770.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-5770","state":"PUBLISHED","datePublished":"2024-01-09T22:02:03.839Z","dateUpdated":"2025-06-03T14:29:46.790Z","assignerShortName":"Proofpoint","assignerOrgId":"d83a79dd-e128-4b83-8b64-84faf54eed46","dateReserved":"2023-10-25T17:57:53.751Z"},"containers":{"cna":{"title":"HTML injection in email body through email subject","descriptions":[{"lang":"en","value":"Proofpoint Enterprise Protection contains a vulnerability in the email delivery agent that allows an unauthenticated attacker to inject improperly encoded HTML into the email body of a message through the email subject.  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