CVE-2025-6050: Mezzanine Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-7pr5-w74r-jjj7
Share
CWE-79
Published
Advisory Summary

CVE-2025-6050 is a MODERATE cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Mezzanine libraries in the PyPI ecosystem. The issue involves mezzanine cms has a stored cross-site scripting (xss) vulnerability in the displayable_links_js function. Remediation is available by upgrading affected packages to version 6.1.1.

CVE-2025-6050 at a Glance

CVE Identifier CVE-2025-6050
GHSA Identifier GHSA-7pr5-w74r-jjj7
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Mezzanine
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2025-6050

To remediate this vulnerability, upgrade all affected Mezzanine dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Mezzanine fixed: 6.1.1 
pip install Mezzanine>=6.1.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show Mezzanine

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-6050, inspect your installed packages using pip:

pip show Mezzanine

Analyze the terminal output to locate any version of Mezzanine in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.1.1), your application is affected.

Note: The pip show Mezzanine command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where 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. In Mezzanine, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2025-6050 Affected Mezzanine Versions

1 component(s)
Fixed Versions:
6.1.1
Product / Package Ecosystem Affected Versions Fixed Version
Mezzanine
pypi/Mezzanine
PyPI
< 6.1.1
6.1.1

References

NVD — CVE-2025-6050 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6050
Security Fix Commit FIX COMMIT
https://github.com/stephenmcd/mezzanine/commit/898630d8df48cf3ddb8b9942f59168b93216e3f8
advisory.checkmarx.net/advisory/cve-2025-6... WEB
https://advisory.checkmarx.net/advisory/CVE-2025-6050
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-7pr5-w74r-jjj7
Mezzanine Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/mezzanine/PYSEC-2025-236.yaml
Mezzanine Source Repository REPOSITORY
https://github.com/stephenmcd/mezzanine
Mezzanine Source Repository REPOSITORY
https://github.com/stephenmcd/mezzanine/discussions/2080
https//github.com/stephen... WEB
https://https://github.com/stephenmcd/mezzanine/commit/898630d8df48cf3ddb8b9942f59168b93216e3f8

Frequently Asked Questions

What is CVE-2025-6050?
CVE-2025-6050 is a security vulnerability in Mezzanine involving Mezzanine CMS has a Stored Cross-Site Scripting (XSS) vulnerability in the displayable_links_js function under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Mezzanine versions are affected?
Affected versions include releases prior to 6.1.1 across affected packages: Mezzanine.
What version fixes CVE-2025-6050?
Upgrading to 6.1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Mezzanine affected?
Yes, Mezzanine is affected in releases prior to 6.1.1. Upgrade your dependency to 6.1.1 or later.
What CWE is associated with CVE-2025-6050?
CVE-2025-6050 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (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.).
How can I check PyPI dependencies for CVE-2025-6050?
Run the dependency tree command: 'pip show Mezzanine'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7pr5-w74r-jjj7",
  "modified" : "2026-07-20T21:22:12Z",
  "published" : "2025-06-17T12:31:15Z",
  "aliases" : [ "CVE-2025-6050" ],
  "summary" : "Mezzanine CMS has a Stored Cross-Site Scripting (XSS) vulnerability in the displayable_links_js function",
  "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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Mezzanine"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-6050"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/stephenmcd/mezzanine/commit/898630d8df48cf3ddb8b9942f59168b93216e3f8"
  }, {
    "type" : "WEB",
    "url" : "https://advisory.checkmarx.net/advisory/CVE-2025-6050"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-7pr5-w74r-jjj7"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/mezzanine/PYSEC-2025-236.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/stephenmcd/mezzanine"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/stephenmcd/mezzanine/discussions/2080"
  }, {
    "type" : "WEB",
    "url" : "https://https://github.com/stephenmcd/mezzanine/commit/898630d8df48cf3ddb8b9942f59168b93216e3f8"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-17T15:38:10Z",
    "nvd_published_at" : "2025-06-17T11:15:22Z"
  }
}