CVE-2026-6433 Details.
FlipperCode Custom CSS, JS & PHP <= 2.0.7 - Remote Code Execution
Atlas does not check this one. Needs requests that change data.
To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-6433. What It Means.
Custom css-js-php WordPress plugin through 2.0.7 contains a command injection caused by unsanitized user input used in SQL query and passed to eval(), letting unauthenticated attackers execute arbitrary PHP code on the server.
Affected Product. What Is Hit.
- Vendor
- flippercode
- Product
- FlipperCode Custom CSS JS PHP
References. Where To Read More.
- https://wpscan.com/vulnerability/a0b1c059-e156-4402-ac8d-67f8ad7386cc/
- https://github.com/murrez/CVE-2026-6433
- https://patchstack.com/database/wordpress/plugin/custom-css-js-php/vulnerability/wordpress-custom-css-js-php-plugin-2-0-7-unauthenticated-sql-injection-to-rce-vulnerability
- https://nvd.nist.gov/vuln/detail/CVE-2026-6433
FAQ
Common Questions.
FlipperCode Custom CSS, JS & PHP <= 2.0.7 - Remote Code Execution. Custom css-js-php WordPress plugin through 2.0.7 contains a command injection caused by unsanitized user input used in SQL query and passed to eval(), letting unauthenticated attackers execute arbitrary PHP code on the server.
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-6433 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-6433 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update FlipperCode Custom CSS JS PHP to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-6433. Atlas does not run a check for it, so nothing here says whether a particular site is affected.