CVE-2025-11687: Gi docgen Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-6p6h-rqr6-62mv
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2025-11687 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Gi docgen libraries in the PyPI ecosystem. The issue involves gi-docgen vulnerable to reflected xss via unescaped query strings. Remediation is available by upgrading affected packages to version 2025.5.

CVE-2025-11687 at a Glance

CVE Identifier CVE-2025-11687
GHSA Identifier GHSA-6p6h-rqr6-62mv
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Gi docgen
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 6.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2025-11687

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

gi-docgen fixed: 2025.5 
pip install gi-docgen>=2025.5
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 gi-docgen

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-11687, inspect your installed packages using pip:

pip show gi-docgen

Analyze the terminal output to locate any version of Gi docgen in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2025.5), your application is affected.

Note: The pip show gi-docgen 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 Gi docgen, 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

A flaw was found in GI-DocGen. This vulnerability allows arbitrary JavaScript execution in the context of the page — enabling DOM access, session cookie theft and other client-side attacks — via a crafted URL that supplies a malicious value to the q GET parameter (reflected DOM XSS).

CVE-2025-11687 Affected Gi docgen Versions

1 component(s)
Fixed Versions:
2025.5
Product / Package Ecosystem Affected Versions Fixed Version
gi-docgen
pypi/gi-docgen
PyPI
< 2025.5
2025.5

References

NVD — CVE-2025-11687 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11687
Gi docgen Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2025-11687
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2403536
Gi docgen Source Repository REPOSITORY
https://github.com/GNOME/gi-docgen
gitlab.gnome.org/gnome/gi-docgen/-/c... WEB
https://gitlab.gnome.org/GNOME/gi-docgen/-/commit/65d16b8ac178900602da540c8f5df4f52d5e8cf6
gitlab.gnome.org/gnome/gi-docgen/-/i... WEB
https://gitlab.gnome.org/GNOME/gi-docgen/-/issues/228

Frequently Asked Questions

What is CVE-2025-11687?
CVE-2025-11687 is a security vulnerability in Gi docgen involving GI-DocGen vulnerable to Reflected XSS via unescaped query strings under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Gi docgen versions are affected?
Affected versions include releases prior to 2025.5 across affected packages: gi-docgen.
What version fixes CVE-2025-11687?
Upgrading to 2025.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is gi-docgen affected?
Yes, gi-docgen is affected in releases prior to 2025.5. Upgrade your dependency to 2025.5 or later.
What is the CVSS score of CVE-2025-11687?
CVE-2025-11687 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2025-11687?
CVE-2025-11687 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-2025-11687?
Run the dependency tree command: 'pip show gi-docgen'. 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-6p6h-rqr6-62mv",
  "modified" : "2026-01-27T21:04:10Z",
  "published" : "2026-01-26T21:30:36Z",
  "aliases" : [ "CVE-2025-11687" ],
  "summary" : "GI-DocGen vulnerable to Reflected XSS via unescaped query strings",
  "details" : "A flaw was found in GI-DocGen. This vulnerability allows arbitrary JavaScript execution in the context of the page — enabling DOM access, session cookie theft and other client-side attacks — via a crafted URL that supplies a malicious value to the q GET parameter (reflected DOM XSS).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "gi-docgen"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2025.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-11687"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2025-11687"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2403536"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/GNOME/gi-docgen"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.gnome.org/GNOME/gi-docgen/-/commit/65d16b8ac178900602da540c8f5df4f52d5e8cf6"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.gnome.org/GNOME/gi-docgen/-/issues/228"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-27T21:04:10Z",
    "nvd_published_at" : "2026-01-26T20:16:07Z"
  }
}