Security advisory

{
  "id": "ef76f18933694d006ff9330180d3c72425c1603892094e79c76b3854eebd754e",
  "url": "https://osv.dev/vulnerability/CVE-2025-53490",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2025-53490",
    "summary": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - CampaignEvents Extension: from 1.43.X before 1.43.2.",
    "evidence": "osv:CVE-2025-53490",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-53490",
      "aliases": [
        "CVE-2025-53490"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wikimedia/mediawiki",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8216997ffcc956a610635f07044fb9a3b5dda9d9"
                },
                {
                  "fixed": "0af28b77ee97ff26c62ce647bb12963adde19d22"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.43.X"
                      },
                      {
                        "fixed": "1.43.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.43.1",
            "1.43.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-53490.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:46.430718786Z",
      "provider": "osv",
      "references": [
        "https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CampaignEvents/+/1165949",
        "https://phabricator.wikimedia.org/T395622"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2025-53490",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 436332,
  "published_at": "2025-07-03T16:15:23.823+00:00"
}