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Medium severity5.3NVD Advisory· Published Jan 9, 2024· Updated Jun 17, 2026

CVE-2023-5770

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.

AI Insight

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Affected products

5
  • Proofpoint/Enterprise Protection5 versions
    cpe:2.3:a:proofpoint:enterprise_protection:8.18.6:*:*:*:*:*:*:*+ 4 more
    • cpe:2.3:a:proofpoint:enterprise_protection:8.18.6:*:*:*:*:*:*:*
    • cpe:2.3:a:proofpoint:enterprise_protection:8.20.0:*:*:*:*:*:*:*
    • cpe:2.3:a:proofpoint:enterprise_protection:8.20.2:*:*:*:*:*:*:*
    • (no CPE)range: 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
    • (no CPE)range: 8.20.2

Patches

Vulnerability mechanics

References

1

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