What is CVE-2025-0431?

CVE-2025-0431 is a medium-severity vulnerability in Proofpoint Enterprise Protection, classified under CWE-790. CVSS score: 5.8/10. Published 2025-03-19.

How severe is CVE-2025-0431?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Vulnerability in Proofpoint Enterprise Protection

CVE-2025-0431

Enterprise Protection contains a vulnerability in URL rewriting that allows an unauthenticated remote attacker to send an email which bypasses URL protections impacting the integrity of recipient's email. This occurs due to improper filtering of backslashes within URLs and affects all versions of 8.21, 8.20 and 8.18 prior to 8.21.0 patch 5115, 8.20.6 patch 5114 and 8.18.6 patch 5113 respectively.

EPSS: 0.004 (33.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.

Affected products

Proofpoint Enterprise Protection — versions 8.18.6, 8.20.6, 8.21.0

Weakness classification (CWE)

CWE-790

References

security@proofpoint.com

Frequently asked questions

What is CVE-2025-0431?: CVE-2025-0431 is a medium-severity vulnerability in Proofpoint Enterprise Protection, classified under CWE-790. CVSS score: 5.8/10. Published 2025-03-19.
How severe is CVE-2025-0431?: Medium severity. CVSS v3 base score is 5.8 out of 10.