What is CVE-2025-9501?

CVE-2025-9501 is a critical-severity vulnerability in W3 Total Cache, classified under CWE-78 OS COMMAND INJECTION. CVSS score: 9.0/10. Published 2025-11-17.

How severe is CVE-2025-9501?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Is CVE-2025-9501 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in W3 Total Cache

CVE-2025-9501

The W3 Total Cache WordPress plugin before 2.8.13 is vulnerable to command injection via the _parse_dynamic_mfunc function, allowing unauthenticated users to execute PHP commands by submitting a comment with a malicious payload to a post.

Published 2025-11-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.226 (97.7th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.205 · newest: 0.226 · change: +0.022

Affected products

W3 Total Cache — versions 0

Public proof-of-concept exploits

InnerFireZ/CVE-2025_9501-POC

References

wpscan.com/vulnerability/6697a2c9-63ae-42f0-8931-f2e5d67d45ae/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2025-9501?: CVE-2025-9501 is a critical-severity vulnerability in W3 Total Cache, classified under CWE-78 OS COMMAND INJECTION. CVSS score: 9.0/10. Published 2025-11-17.
How severe is CVE-2025-9501?: Critical severity. CVSS v3 base score is 9.0 out of 10.
Is CVE-2025-9501 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.