agentleFS
mastereadmasteread/php2shell-checker-claude/skills/server/SKILL.md

server

Skill2 starsChanged 25 days agoApache-2.0View on GitHub

Check whether the PHP serving a site on this machine or server is patched against PHP2Shell (October 2026 PHP security releases). Use when the user has local or SSH access and asks if their PHP install is vulnerable or patched.

1 other project uses a version of this.

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  • Other versions1 project uses a version of this.

    Word for word · 0

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    Wrote their own version · 1

    1. DegreeSign/skills★ 1same name

    How matches are found. Word for word: the exact same text. Edited: shares passages with this file (“99% same” means 99% of its five-word phrases also appear here; 10% or more counts). Their own version: similar meaning, or, weakest, the same name. We can’t tell which project had it first. Projects are counted among the 200 most-starred candidates, and mentions are links to the repository we found, up to 50 per site, so both counts are a floor.

  • In this repositoryOne other file it gives its agents.

The file

We split this skill into the rules it gives an agent

2 rules. About 0 are common, 0 are distinctive, and 2 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈0

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 2

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    Check the PHP version serving the site.

    line 14
  2. Very specific:

    If the user cannot update immediately, the advisory lists measures that reduce exposure but do not make an installation safe, such as …

    line 51

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

PHP2Shell refers to CVE-2026-109618 (RCE via OOM corruption) and CVE-2026-109619 (RCE via stale global state), fixed in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 on October 21, 2026 (https://www.php.net/archive/2026.php#2026-10-21-5). They affect every PHP installation serving web requests: PHP-FPM, Apache with mod_php (highest risk), php-cgi, FrankenPHP and LiteSpeed.

Check the PHP version serving the site. Start with php -v, but verify that it matches the site's PHP-FPM or Apache installation. The CLI binary is often a different version from the one that serves web requests. Look for php-fpm* binaries, the web server's PHP handler, or a phpinfo() page the user already has.

Vulnerable ranges used by the checker as of October 20, 2026:

PHP branchVulnerable range (inclusive)
5.45.4.0 to 5.4.45
5.55.5.0 to 5.5.38
5.65.6.0 to 5.6.40
7.07.0.0 to 7.0.33
7.17.1.0 to 7.1.33
7.27.2.0 to 7.2.34
7.37.3.0 to 7.3.33
7.47.4.0 to 7.4.33
8.08.0.0 to 8.0.30
8.18.1.0 to 8.1.34
8.28.2.0 to 8.2.34
8.38.3.0 to 8.3.35
8.48.4.0 to 8.4.26
8.58.5.0 to 8.5.11

Compare the version and full package revision with current PHP or vendor security advisories. Vendor backports may fix an older version. For a distribution package, check the installed package revision (for example with dpkg -l 'php*' or rpm -qa 'php*') against the vendor's advisory. Treat unlisted branches as unknown until an advisory confirms their status.

PHP 8.1 and older received no upstream release. They are fixed only by a distribution or LTS vendor backport, or by a build from the PHP security team's source backport branches for 7.4, 8.0 and 8.1. These builds keep the old version number, so confirm the build source before reporting them as patched. Packages from rpms.remirepo.net were not updated on release day.

If the user cannot update immediately, the advisory lists measures that reduce exposure but do not make an installation safe, such as session.upload_progress.enabled=0 and a low post_max_size set in php.ini or the FPM pool, followed by a restart of every worker. Point the user to the advisory for the full list, and always say that updating is the only complete fix.

The running PHP build and the vendor's package advisory are the useful checks. Configuration settings alone do not establish that PHP is patched. Report the version, patch status, and any required update. If you cannot verify the serving version, report unknown. Do not run exploit probes.

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