CVE-2021-43617 in the critical feed json
Withdrawn: Laravel Framework does not sufficiently block the upload of executable PHP content.
published 2021-11-14 4 y ago modified 2026-09-10 1 mo ago also GHSA-364w-9g92-3grq , EUVD-2021-2284
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 20.0%
- EPSS 20.0% chance of exploitation in 30 days, percentile 97%
- public exploits
- 1
- Exploit-DB
Summary
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.
Patch / fix
- php-laravel-framework Debian 14, Debian 13, Debian 12 6.20.14+dfsg-3
debian advisories DEBIAN-CVE-2021-43617
Timeline
- Published
- First public exploit (EDB-50525)
Exploit prediction
19.96% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-50525 PHP Laravel 8.70.1 - Cross Site Scripting (XSS) to Cross Site Request Forgery (CSRF) webapps, 2021-11-15
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
salsa.debian.org
/php-team/php/-/commit/dc253886b5b2e9bc8d9e36db787abb083a667fd8
web, patch, third-party-advisory
-
salsa.debian.org
/php-team/php/-/blob/dc253886b5b2e9bc8d9e36db787abb083a667fd8/debian/php-cgi.conf#L5-6
web, patch, third-party-advisory
-
github.com
/laravel/framework/blob/2049de73aa099a113a287587df4cc522c90961f5/src/Illuminate/Validation/Concerns/ValidatesA
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-43617
advisory
-
github.com
/laravel/framework
package
-
github.com
/laravel/framework/blob/2049de73aa099a113a287587df4cc522c90961f5/src/Illuminate/Validation/Concerns/ValidatesA
web
-
hosein-vita.medium.com
/laravel-8-x-image-upload-bypass-zero-day-852bd806019b
web
Sources
- CVE List CVE-2021-43617
- GitHub Advisory GHSA-364w-9g92-3grq
- NVD CVE-2021-43617
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