CVE-2025-62671: Mediawiki/cargo Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-gr6v-3pmp-996p
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CWE-79
Published
Advisory Summary

CVE-2025-62671 is a MODERATE cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Mediawiki/cargo libraries in the Packagist ecosystem. The issue involves cargo mediawiki extension vulnerable to cross-site scripting. Remediation is available by upgrading affected packages to version 3.8.3.

CVE-2025-62671 at a Glance

CVE Identifier CVE-2025-62671
GHSA Identifier GHSA-gr6v-3pmp-996p
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 Mediawiki/cargo
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2025-62671

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

mediawiki/cargo fixed: 3.8.3 
Upgrade mediawiki/cargo to 3.8.3
Verify Direct and Transitive Dependencies

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

inspect dependencies for mediawiki/cargo

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-62671, inspect your project dependencies for Mediawiki/cargo:

inspect dependencies for mediawiki/cargo

Analyze the terminal output to locate any version of Mediawiki/cargo in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.8.3), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

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 Mediawiki/cargo, 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

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - Cargo Extension allows Stored XSS. This issue affects Mediawiki - Cargo Extension befor 3.8.3.

CVE-2025-62671 Affected Mediawiki/cargo Versions

1 component(s)
Fixed Versions:
3.8.3
Product / Package Ecosystem Affected Versions Fixed Version
mediawiki/cargo
 Packagist
< 3.8.3
3.8.3

References

Security Fix Commit FIX COMMIT
https://github.com/wikimedia/mediawiki-extensions-Cargo/commit/e50915626c0d9a7b222dabc94ddfcb516caf557d
gerrit.wikimedia.org/r/1179707 WEB
https://gerrit.wikimedia.org/r/1179707
Mediawiki/cargo Source Repository REPOSITORY
https://github.com/wikimedia/mediawiki-extensions-Cargo
phabricator.wikimedia.org/t402147 WEB
https://phabricator.wikimedia.org/T402147
NVD — CVE-2025-62671 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-62671

Frequently Asked Questions

What is CVE-2025-62671?
CVE-2025-62671 is a security vulnerability in Mediawiki/cargo involving Cargo Mediawiki Extension vulnerable to Cross-site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Mediawiki/cargo versions are affected?
Affected versions include releases prior to 3.8.3 across affected packages: mediawiki/cargo.
What version fixes CVE-2025-62671?
Upgrading to 3.8.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mediawiki/cargo affected?
Yes, mediawiki/cargo is affected in releases prior to 3.8.3. Upgrade your dependency to 3.8.3 or later.
What CWE is associated with CVE-2025-62671?
CVE-2025-62671 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 Packagist dependencies for CVE-2025-62671?
Run the dependency tree command: 'inspect dependencies for mediawiki/cargo'. 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-gr6v-3pmp-996p",
  "modified" : "2025-10-20T17:54:59Z",
  "published" : "2025-10-18T06:30:26Z",
  "aliases" : [ "CVE-2025-62671" ],
  "summary" : "Cargo Mediawiki Extension vulnerable to Cross-site Scripting",
  "details" : "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - Cargo Extension allows Stored XSS. This issue affects Mediawiki - Cargo Extension befor 3.8.3.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "mediawiki/cargo"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.8.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-62671"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/wikimedia/mediawiki-extensions-Cargo/commit/e50915626c0d9a7b222dabc94ddfcb516caf557d"
  }, {
    "type" : "WEB",
    "url" : "https://gerrit.wikimedia.org/r/1179707"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/wikimedia/mediawiki-extensions-Cargo"
  }, {
    "type" : "WEB",
    "url" : "https://phabricator.wikimedia.org/T402147"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-10-20T17:54:59Z",
    "nvd_published_at" : "2025-10-18T05:15:34Z"
  }
}