CVE-2026-6433 Custom CSS JS PHP <= 2.0.7 - Unauthenticated SQL Injection to RCE
Unauthenticated attackers can exploit SQL injection to execute arbitrary PHP code via eval in the Custom CSS JS PHP plugin.
- 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-2026-6433?
CVE-2026-6433 is a high-severity SQL injection vulnerability in Unknown Custom css-js-php, published on 11 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Custom css-js-php WordPress plugin through 2.0.7 does not properly sanitize user input before using it in a SQL query, and the result is passed to eval(), allowing unauthenticated users to execute arbitrary PHP code on the server.
Which versions are affected by CVE-2026-6433?
How do I fix CVE-2026-6433?
No fix has been published for CVE-2026-6433 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-6433 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6433 exists.
Public exploit code: 1 Nuclei template and 1 proofs of concept on GitHub.
Sources
Also known as GHSA-c697-h8w8-m356.