Stored i18n XSS in WikiLambda's VisualEditor integration

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-100383",
    "assignerOrgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
    "assignerShortName": "wikimedia-foundation",
    "dateUpdated": "2026-09-25T21:05:51.966Z",
    "dateReserved": "2026-09-25T19:28:17.568Z",
    "datePublished": "2026-09-25T21:05:51.966Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
        "shortName": "wikimedia-foundation",
        "dateUpdated": "2026-09-25T21:05:51.966Z"
      },
      "title": "Stored i18n XSS in WikiLambda's VisualEditor integration",
      "descriptions": [
        {
          "lang": "en",
          "value": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiLambda Extension allows Cross-Site Scripting (XSS).\n\nThis issue affects Mediawiki - WikiLambda Extension: 1.47.0-alpha. The issue has been remediated on the `master` branch.",
          "supportingMedia": [
            {
              "type": "text/html",
              "base64": false,
              "value": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiLambda Extension allows Cross-Site Scripting (XSS).<p>This issue affects Mediawiki - WikiLambda Extension: 1.47.0-alpha. The issue has been remediated on the `master` branch.</p>"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Wikimedia Foundation",
          "product": "Mediawiki - WikiLambda Extension",
          "repo": "https://gerrit.wikimedia.org/g/mediawiki/extensions/WikiLambda/+/refs/heads/master",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1.47.0-alpha",
              "status": "affected"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')",
              "cweId": "CWE-79",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://phabricator.wikimedia.org/T434967"
        },
        {
          "url": "https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikiLambda/+/1326391"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-63",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-63 Cross-Site Scripting (XSS)"
            }
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "SomeRandomDeveloper",
          "type": "finder"
        }
      ]
    }
  }
}