CVE-2025-6050: mezzanine XSS — Exploit & Fix

Description

Mezzanine CMS, in versions prior to 6.1.1, contains a Stored Cross-Site Scripting (XSS) vulnerability in the admin interface. The vulnerability exists in the "displayable_links_js" function, which fails to properly sanitize blog post titles before including them in JSON responses served via "/admin/displayable_links.js". An authenticated admin user can create a blog post with a malicious JavaScript payload in the title field, then trick another admin user into clicking a direct link to the "/admin/displayable_links.js" endpoint, causing the malicious script to execute in their browser.

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CVSS v3.1 Score

4.8

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
jupo	mezzanine	< 6.1.1

References

Advisories & Patches

https://github.com/stephenmcd/mezzanine/commit/898630d8df48cf3ddb8b9942f59168b93216e3f8

Exploits

https://advisory.checkmarx.net/advisory/CVE-2025-6050/

Other References

https://github.com/stephenmcd/mezzanine/discussions/2080

Frequently Asked Questions

What is CVE-2025-6050? +

Mezzanine CMS, in versions prior to 6.1.1, contains a Stored Cross-Site Scripting (XSS) vulnerability in the admin interface. The vulnerability exists in the "displayable_links_js" function, which fails to properly sanitize blog post titles before including them in JSON responses served via "/admin/displayable_links.js". An authenticated admin user can create a blog post with a malicious JavaScript payload in the title field, then trick another admin user into clicking a direct link to the "/admin/displayable_links.js" endpoint, causing the malicious script to execute in their browser. It has a CVSS v3.1 base score of 4.8 (MEDIUM).

How severe is CVE-2025-6050? +

CVE-2025-6050 has a CVSS v3.1 score of 4.8 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-2025-6050? +

CVE-2025-6050 affects products from jupo, specifically: mezzanine. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-6050? +

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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