CVE-2023-53976

Description

myBB Forums 1.8.26 contains a stored cross-site scripting vulnerability in the template management system that allows authenticated administrators to inject malicious scripts when creating new templates. Attackers can exploit this vulnerability by inserting script payloads in the template title field when adding new templates through the 'Templates and Style' > 'Templates' > 'Manage Templates' > 'Global Templates' interface, causing arbitrary JavaScript to execute when the template is viewed.

CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
mybb	mybb	All

References

Exploits

https://www.exploit-db.com/exploits/51136 https://www.vulncheck.com/advisories/mybb-forums-stored-cross-site-scripting-via-template-management

Other References

https://mybb.com/ https://www.cve.org/CVERecord?id=CVE-2021-41866

Frequently Asked Questions

What is CVE-2023-53976? +

myBB Forums 1.8.26 contains a stored cross-site scripting vulnerability in the template management system that allows authenticated administrators to inject malicious scripts when creating new templates. Attackers can exploit this vulnerability by inserting script payloads in the template title field when adding new templates through the 'Templates and Style' > 'Templates' > 'Manage Templates' > 'Global Templates' interface, causing arbitrary JavaScript to execute when the template is viewed. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2023-53976? +

CVE-2023-53976 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-53976? +

CVE-2023-53976 affects products from mybb, specifically: mybb. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-53976? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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