Nystudio107 SEOmatic Plugin 3.4.10 on Craft CMS Base64 Encoded URL cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as problematic, was found in Nystudio107 SEOmatic Plugin 3.4.10 on Craft CMS. Affected is some unknown functionality of the file /index.php?action=seomatic/file/seo-file-link of the component Base64 Encoded URL Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

A cross-site scripting (XSS) vulnerability in the SEOmatic plugin 3.4.10 for Craft CMS 3 allows remote attackers to inject arbitrary web script via a GET to /index.php?action=seomatic/file/seo-file-link with url parameter containing the base64 encoded URL of a malicious web page / file and fileName parameter containing an arbitrary filename with the intended content-type to be rendered in the user's browser as the extension.

The weakness was published 06/13/2022 as 4e46b792ce973ac0c652fb330055f41aca1981c8. The advisory is available at github.com. This vulnerability is traded as CVE-2021-41750 since 09/27/2021. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Applying the patch 4e46b792ce973ac0c652fb330055f41aca1981c8 is able to eliminate this problem. The bugfix is ready for download at github.com.

Similar entry is available at VDB-80153.






CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Class: Cross site scripting
CWE: CWE-79 / CWE-74 / CWE-707

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
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Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 4e46b792ce973ac0c652fb330055f41aca1981c8


09/27/2021 🔍
06/13/2022 +259 days 🔍
06/13/2022 +0 days 🔍
06/13/2022 +0 days 🔍


Advisory: 4e46b792ce973ac0c652fb330055f41aca1981c8
Status: Confirmed

CVE: CVE-2021-41750 (🔍)
See also: 🔍


Created: 06/13/2022 06:41 AM
Changes: 06/13/2022 06:41 AM (44)
Complete: 🔍
Cache ID: 35:960:40


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