If you are wondering whether your website is affected, we have packaged a Codex skill to help check. Point your Codex at this repo to guide you through it: https://github.com/openai/php2shell-checker…

openai/php2shell-checker

Source: https://github.com/openai/php2shell-checker

PHP Version Checker

Check a website or local PHP binary to see if it’s vulnerable to php2shell.

To install both skills, ask Codex:

$skill-installer install both skills from https://github.com/openai/php2shell-checker

Use phpcheck-server when you have server access, or phpcheck-url when you only have a URL:

$phpcheck-url check https://example.com

$phpcheck-server check the PHP version serving my site

Run directly

Check a website:

node phpcheck.js "https://example.com"

Check the local CLI PHP

node phpcheck.js --local

Results

Use --json for machine-readable output (patch_status is ok, vulnerable, or unknown). Invalid arguments exit with code 2.

Tests

node --test phpcheck.test.js

Tests run the CLI against local HTTP servers and a fake PHP executable. No PHP installation or external website is required.

Limitations

The checker only evaluates versions exposed in HTTP response headers or by php -v. It reads X-Powered-By and Server, sends HEAD, and falls back to GET only when HEAD returns 405 or 501. It does not follow redirects or inspect response bodies. Missing or hidden PHP headers return UNKNOWN.

OK is a version comparison based on the assumption that subsequent stable patches in each listed branch contain the fix. It does not independently verify a security fix. Check the versions against the official PHP security release. Headers can be hidden or changed, and distribution backports may not change the upstream version. UNKNOWN does not mean the target is patched!

Contributing

OpenAI is not accepting external code contributions to this project. Bug reports and non-code feedback are welcome through GitHub issues. See CONTRIBUTING.md.

License

This project is licensed under the Apache License 2.0.

OpenAI (@OpenAI): OpenAI models helped researchers—operating as part of our Patch the Planet initiative—discover critical security flaws in PHP, an open-source programming language used to run an estimated 70% of websites.

Over the past two months, we led a coalition of maintainers, researchers,