{"id":"CVE-2023-5770","aliases":["EUVD-2023-58053","GHSA-q8q6-ccrm-hrm9"],"status":"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.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0034,"percentile":0.27742,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-838"],"published":"2024-01-09T22:02:03Z","modified":"2026-06-17T06:49:20Z","products":[{"vendor":"proofpoint","product":"enterprise_protection"},{"vendor":"proofpoint","product":"proofpoint enterprise protection"}],"references":[{"url":"https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2023-0009","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5770"},{"url":"https://github.com/advisories/GHSA-q8q6-ccrm-hrm9"}],"sources":{"cve":[{"id":"CVE-2023-5770","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","status":"published","published":"2024-01-09T22:02:03.839Z","modified":"2025-06-03T14:29:46.79Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-838"],"updated_at":"2026-11-02T14:35:17.149492Z"}],"euvd":[{"id":"EUVD-2023-58053","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","status":"published","published":"2024-01-09T22:02:03Z","modified":"2025-06-03T14:29:46Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T20:32:31.558173Z"}],"ghsa":[{"id":"GHSA-q8q6-ccrm-hrm9","title":"Proofpoint Enterprise Protection contains a vulnerability in the email delivery agent that allows...","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","status":"published","published":"2024-01-10T00:30:21Z","modified":"2024-01-10T00:30:21Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-838"],"updated_at":"2026-11-02T14:55:22.936224Z"}],"nvd":[{"id":"CVE-2023-5770","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","status":"published","published":"2024-01-09T22:15:43.4Z","modified":"2026-06-17T06:49:20.14Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-838"],"updated_at":"2026-11-02T14:09:00.788714Z"}]}}