MEDIUM 4.8

PYSEC-2025-236

Details

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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Affected packages

PyPI / mezzanine

Introduced in: 0 Fixed in: 6.1.1

Fix pip install --upgrade 'mezzanine>=6.1.1'

References

https://github.com/stephenmcd/mezzanine/discussions/2080 [REPORT]
https://github.com/stephenmcd/mezzanine/commit/898630d8df48cf3ddb8b9942f59168b93216e3f8 [FIX]
https://advisory.checkmarx.net/advisory/CVE-2025-6050/ [EVIDENCE]