CVE-2021-43617

Description

Laravel Framework through 8.70.2 does not sufficiently block the upload of executable PHP content because Illuminate/Validation/Concerns/ValidatesAttributes.php lacks a check for .phar files, which are handled as application/x-httpd-php on systems based on Debian. NOTE: this CVE Record is for Laravel Framework, and is unrelated to any reports concerning incorrectly written user applications for image upload.

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗

Release	Package	Fixed in	Advisory
Debian 14	php-laravel-framework	6.20.14+dfsg-3	—
Debian 13	php-laravel-framework	6.20.14+dfsg-3	—
Debian 12	php-laravel-framework	6.20.14+dfsg-3	—

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Exploit-DB 1

PHP Laravel 8.70.1 - Cross Site Scripting (XSS) to Cross Site Request Forgery (CSRF) EDB-50525 · webapps · Nov 15, 2021

GitHub 3 repositories

Sybelle03/CVE-2021-43617 ★ 1 · Jun 8, 2023

This is a reproduction of PHP Laravel 8.70.1 - Cross Site Scripting (XSS) to Cross Site Request Forgery (CSRF) vulnerability
aweiiy/CVE-2021-43617 ★ 0 · Aug 3, 2022
kombat1/CVE-2021-43617 ★ 0 · Nov 19, 2021

CVE-2021-43617 bypass CRF

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Laravel Framework through 8.70.2 does not sufficiently block the upload of executable PHP content because Illuminate/Validation/Concerns/Va…