RCE in Wpengine, Inc. Advanced Custom Fields

CVE-2025-54940

An HTML injection vulnerability exists in WordPress plugin "Advanced Custom Fields" prior to 6.4.3. If this vulnerability is exploited, crafted HTML code may be rendered and page display may be tampered.

Vulnerability class: RCE (Remote Code Execution)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 3.4 (Low). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (10.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-54940: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-54940?
CVE-2025-54940 is a low-severity vulnerability in Wpengine, Inc. Advanced Custom Fields, classified under Code Injection. CVSS score: 3.4/10. Published 2025-08-08.
How severe is CVE-2025-54940?
Low severity. CVSS v3 base score is 3.4 out of 10.