CVE-2023-5771

HTML injection in AdminUI through email subject

MEDIUM
6.1
CVSS Score
Published: November 6, 2023 at 08:06 PM UTC
Updated: June 17, 2026 at 06:49 AM UTC
1 product affected across 1 vendorEnterprise Protection

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Proofpoint Enterprise Protection contains a stored XSS vulnerability in the AdminUI. An unauthenticated attacker can send a specially crafted email with HTML in the subject which triggers XSS when viewing quarantined messages.  This issue affects Proofpoint Enterprise Protection: from 8.20.0 before patch 4796, from 8.18.6 before patch 4795 and all other prior versions.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 8.18.68.0 ≤ v < 8.18.68.18.6 ≤ v < patch 47958.20.0 ≤ v < patch 47968.08.18.68.20.0
Affected range stops below 8.18.6, so it looks safe — our inference, not a vendor statement
Affected range stops below patch 4795, so it looks safe — our inference, not a vendor statement
Affected range stops below patch 4796, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMProofpoint
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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