How severe is CVE-2025-8723?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2025-8723 known to be exploited?

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

RCE in Mecanik Cloudflare Image Resizing – Optimize & Accelerate Your Images

CVE-2025-8723

The Cloudflare Image Resizing plugin for WordPress is vulnerable to Remote Code Execution due to missing authentication and insufficient sanitization within its hook_rest_pre_dispatch() method in all versions up to, and including, 1.5.6. This makes it possible for unauthenticated attackers to inject arbitrary PHP into the codebase, achieving remote code execution.

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.147 (96.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mecanik Cloudflare Image Resizing – Optimize & Accelerate Your Images — versions 0

Weakness classification (CWE)

CWE-94 — Code Injection

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-8723?: CVE-2025-8723 is a critical-severity vulnerability in Mecanik Cloudflare Image Resizing – Optimize & Accelerate Your Images, classified under Code Injection. CVSS score: 9.8/10. Published 2025-08-19.
How severe is CVE-2025-8723?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2025-8723 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.