Fat-Free Framework arbitrary code execution

CRITICAL 9.8CVE-2020-5203 · GHSA-hpj2-4hfj-g233 · Published 11/03/2020 · updated 17/06/2026

In short

CVE-2020-5203 is a CRITICAL (CVSS 9.8) vulnerability affecting bcosca/fatfree, fat-free framework (fatfreeframework).
Chance of exploitation in the next 30 days (EPSS): 2.1%, higher than 82.1% of all vulnerabilities.
Fix: update to 3.7.2 or later.

Package	Affected versions	Patched versions
bcosca/fatfree Packagist	`< 3.7.2`	`3.7.2`
fat-free framework fatfreeframework	`= 3.7.1`	No fix yet

Description

In Fat-Free Framework 3.7.1, attackers can achieve arbitrary code execution if developers choose to pass user controlled input (e.g., $_REQUEST, $_GET, or $_POST) to the framework's Clear method.

NVD description

In Fat-Free Framework 3.7.1, attackers can achieve arbitrary code execution if developers choose to pass user controlled input (e.g., $_REQUEST, $_GET, or $_POST) to the framework's Clear method.

References

nvd.nist.gov/vuln/detail/CVE-2020-5203 · ADVISORY
bcosca/fatfree-core commit dae95a0 · WEB
bcosca/fatfree · PACKAGE
bcosca/fatfree release · WEB

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