CVE-2026-27384 WordPress W3 Total Cache plugin <= 2.9.1 - Arbitrary Code Execution vulnerability
An attacker can execute arbitrary code on WordPress sites using the W3 Total Cache plugin due to improper input validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-27384?
CVE-2026-27384 is a critical code injection vulnerability in BoldGrid W3 Total Cache, published on 5 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper Validation of Specified Quantity in Input vulnerability in BoldGrid W3 Total Cache w3-total-cache allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects W3 Total Cache: from n/a through <= 2.9.1.
Weakness: CWE-1284
Which versions are affected by CVE-2026-27384?
How do I fix CVE-2026-27384?
No fix has been published for CVE-2026-27384 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-27384 being exploited?
There is no known exploitation of CVE-2026-27384 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-g2g2-5q7p-hmf2.