Security advisory

{
  "id": "098ea9f2e332a93b2050da29e724011888b2692da00263c18ace09279362f693",
  "url": "https://osv.dev/vulnerability/CVE-2025-53500",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2025-53500",
    "summary": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - MassEditRegex Extension allows Stored XSS.This issue affects Mediawiki - MassEditRegex Extension: from 1.39.X before 1.39.12, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.",
    "evidence": "osv:CVE-2025-53500",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-53500",
      "aliases": [
        "CVE-2025-53500"
      ],
      "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": "19ddcf09181a8b7d2837b4c99e11184c53047697"
                },
                {
                  "fixed": "78458ed106076061322977f86f5140d468de63a3"
                },
                {
                  "introduced": "30d9707511274f256db07dc71010ae0bc6e33d28"
                },
                {
                  "fixed": "30d9707511274f256db07dc71010ae0bc6e33d28"
                },
                {
                  "introduced": "8216997ffcc956a610635f07044fb9a3b5dda9d9"
                },
                {
                  "fixed": "0af28b77ee97ff26c62ce647bb12963adde19d22"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.39.X"
                      },
                      {
                        "fixed": "1.39.12"
                      }
                    ],
                    "source": "DESCRIPTION"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.42.X"
                      },
                      {
                        "fixed": "1.42.7"
                      }
                    ],
                    "source": "DESCRIPTION"
                  },
                  {
                    "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-2025-53500.json"
          }
        }
      ],
      "modified": "2026-10-24T10:31:07.039820823Z",
      "provider": "osv",
      "references": [
        "https://gerrit.wikimedia.org/r/c/mediawiki/extensions/MassEditRegex/+/1163878/",
        "https://phabricator.wikimedia.org/T397334"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2025-53500",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441112,
  "published_at": "2025-07-03T17:15:39.99+00:00"
}