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CVE-2021-43808 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/laravel/framework/commit/b8174169b1807f36de1837751599e2828ceddb9b	CVE	PatchThird Party Advisory
https://github.com/laravel/framework/pull/39906	CVE	PatchThird Party Advisory
https://github.com/laravel/framework/pull/39908	CVE	PatchThird Party Advisory
https://github.com/laravel/framework/pull/39909	CVE	PatchThird Party Advisory
https://github.com/laravel/framework/releases/tag/v6.20.42	CVE	Release NotesThird Party Advisory
https://github.com/laravel/framework/releases/tag/v7.30.6	CVE	Release NotesThird Party Advisory
https://github.com/laravel/framework/releases/tag/v8.75.0	CVE	Release NotesThird Party Advisory
https://github.com/laravel/framework/security/advisories/GHSA-66hf-2p6w-jqfw	CVE	ExploitThird Party Advisory
https://github.com/laravel/framework/commit/b8174169b1807f36de1837751599e2828ceddb9b	[email protected]	PatchThird Party Advisory
https://github.com/laravel/framework/pull/39906	[email protected]	PatchThird Party Advisory
https://github.com/laravel/framework/pull/39908	[email protected]	PatchThird Party Advisory
https://github.com/laravel/framework/pull/39909	[email protected]	PatchThird Party Advisory
https://github.com/laravel/framework/releases/tag/v6.20.42	[email protected]	Release NotesThird Party Advisory
https://github.com/laravel/framework/releases/tag/v7.30.6	[email protected]	Release NotesThird Party Advisory
https://github.com/laravel/framework/releases/tag/v8.75.0	[email protected]	Release NotesThird Party Advisory
https://github.com/laravel/framework/security/advisories/GHSA-66hf-2p6w-jqfw	[email protected]	ExploitThird Party Advisory

see all 16 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-327	Use of a Broken or Risky Cryptographic Algorithm	[email protected]
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
laravel framework	< 6.20.42 >= 7.0.0, < 7.30.6 >= 8.0.0, < 8.75.0
CPE cpe:2.3:a:laravel:framework:::::::: Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Aug 9, 2022	Reanalysis	[email protected]
Dec 8, 2021	Initial Analysis	[email protected]