CVE-2021-43808

 

Published at: - 08-12-2021 01:15

Last modified: - 09-08-2022 03:17

Total changes: - 3

Description

Laravel is a web application framework. Laravel prior to versions 8.75.0, 7.30.6, and 6.20.42 contain a possible cross-site scripting (XSS) vulnerability in the Blade templating engine. A broken HTML element may be clicked and the user taken to another location in their browser due to XSS. This is due to the user being able to guess the parent placeholder SHA-1 hash by trying common names of sections. If the parent template contains an exploitable HTML structure an XSS vulnerability can be exposed. This vulnerability has been patched in versions 8.75.0, 7.30.6, and 6.20.42 by determining the parent placeholder at runtime and using a random hash that is unique to each request.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

 

Verification logic

 

Reference

• https://github.com/laravel/framework/releases/tag/v6.20.42
• https://github.com/laravel/framework/commit/b8174169b1807f36de1837751599e2828ceddb9b
• https://github.com/laravel/framework/pull/39909
• https://github.com/laravel/framework/pull/39908
• https://github.com/laravel/framework/security/advisories/GHSA-66hf-2p6w-jqfw
• https://github.com/laravel/framework/pull/39906
• https://github.com/laravel/framework/releases/tag/v7.30.6
• https://github.com/laravel/framework/releases/tag/v8.75.0

 

Keywords

NVD

 

CVE-2021-43808

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures