File Write Vulnerability in W3 Total Cache Plugin for WordPress
CVE-2026-18051

Currently unrated

Key Information:

Vendor

WordPress
Status
W3 Total Cache
Vendor
CVE Published:
19 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18051?

The W3 Total Cache plugin for WordPress prior to version 2.10.5 contains a vulnerability due to improper validation of request paths. This flaw permits unauthenticated attackers to write files to any directory on the server, potentially overwriting existing files, including critical configuration files like .htaccess on Apache servers. This not only compromises the integrity of the website but may also disrupt security measures by removing essential hardening rules. It is crucial for website administrators using this plugin to promptly update to the latest version to mitigate this risk.

Affected Version(s)

W3 Total Cache 0 < 2.10.5

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-18051 - Proof of Concept

References

https://wpscan.com/vulnerability/dc56cdd2-419b-4a64-9d2a-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jakub Herman
WPScan
.