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OpenAdvisories
Medium · 5.3 CVE-2021-43808 EUVD-2021-2455GHSA-66hf-2p6w-jqfw

Blade `@parent` Exploitation Leading To Possible XSS in Laravel

Published Dec 7, 2021 · Updated Aug 4, 2024 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
laravel framework >= 8.0.0, < 8.75.0, >= 7.0.0, < 7.30.6, < 6.20.42 —

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.

ReleasePackageFixed inAdvisory
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 —

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist illuminate/view < 6.20.42 6.20.42 GHSA-66hf-2p6w-jqfw
Packagist illuminate/view >= 7.0.0, < 7.30.6 7.30.6 GHSA-66hf-2p6w-jqfw
Packagist illuminate/view >= 8.0.0, < 8.75.0 8.75.0 GHSA-66hf-2p6w-jqfw
Packagist laravel/framework < 6.20.42 6.20.42 GHSA-66hf-2p6w-jqfw
Packagist laravel/framework >= 7.0.0, < 7.30.6 7.30.6 GHSA-66hf-2p6w-jqfw
Packagist laravel/framework >= 8.0.0, < 8.75.0 8.75.0 GHSA-66hf-2p6w-jqfw

References