Vulnerability Report

CVE-2021-43808

Title: Laravel Blade templating engine XSS

XSS

Proof Of Concept

No public PoC currently indexed for CVE-2021-43808.

CWE Category CWE-327
Published Date Dec 08, 2021
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 5.3 CVSS v3.1
Exploit Probability (EPSS)
0.36%

Vulnerability Summary

CVE-2021-43808: 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.

Impacted Vendors

Z
zend 1
L
laravel 1

Reference Links

https://github.com/laravel/framework/commit/b8174169b1807f36de1837751599e2828ceddb9b https://github.com/laravel/framework/pull/39906 https://github.com/laravel/framework/pull/39908 https://github.com/laravel/framework/pull/39909 https://github.com/laravel/framework/releases/tag/v6.20.42 https://github.com/laravel/framework/releases/tag/v7.30.6 https://github.com/laravel/framework/releases/tag/v8.75.0 https://github.com/laravel/framework/security/advisories/GHSA-66hf-2p6w-jqfw https://github.com/laravel/framework/commit/b8174169b1807f36de1837751599e2828ceddb9b https://github.com/laravel/framework/pull/39906 https://github.com/laravel/framework/pull/39908 https://github.com/laravel/framework/pull/39909 https://github.com/laravel/framework/releases/tag/v6.20.42 https://github.com/laravel/framework/releases/tag/v7.30.6 https://github.com/laravel/framework/releases/tag/v8.75.0 https://github.com/laravel/framework/security/advisories/GHSA-66hf-2p6w-jqfw
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
5.3
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
6.1
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
4.3
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:M/Au:N/C:N/I:P/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-43808 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity HIGH
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Affected Stack

No specific products linked.