CVE-2023-5771

Name: CVE-2023-5771
Creator: NVD / NIST
Published: 2023-11-06T21:15:10.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2023-5771 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. . EPSS estimates a 0.34% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.34%

26.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Proofpoint	Enterprise Protection	< 8.18.6
Proofpoint	Enterprise Protection	8.18.6
Proofpoint	Enterprise Protection	8.20.0

References

https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2023-0010Vendor Advisory
https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2023-0010Vendor Advisory

Timeline

Published: Nov 6, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5771?

How severe is CVE-2023-5771?

CVE-2023-5771 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5771?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-5771?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST