CVE-2026-100243 (GCVE-0-2026-100243)

Vulnerability from cvelistv5 – Published: 2026-09-29 16:43 – Updated: 2026-09-29 16:43
VLAI
Title
Stored XSS in WikiSEO author and image properties on action=info
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS. This issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10.
Severity
No CVSS data available.
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version CPE status
Wikimedia Foundation Mediawiki - WikiSEO Extension Affected: * , < 1.46.1, 1.45.5, 1.43.10 (semver)
guessed Create a notification for this product.
Credits
Andmcadams
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Mediawiki - WikiSEO Extension",
          "repo": "https://gerrit.wikimedia.org/g/mediawiki/extensions/WikiSEO/+/refs/heads/master",
          "vendor": "Wikimedia Foundation",
          "versions": [
            {
              "lessThan": "1.46.1, 1.45.5, 1.43.10",
              "status": "affected",
              "version": "*",
              "versionType": "semver"
            }
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          "type": "finder",
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            }
          ],
          "value": "Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027) vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.\n\nThis issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-592",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-592 Stored XSS"
            }
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      ],
      "problemTypes": [
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              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-09-29T16:43:00.209Z",
        "orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
        "shortName": "wikimedia-foundation"
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      "references": [
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          "url": "https://phabricator.wikimedia.org/T430896"
        },
        {
          "url": "https://gerrit.wikimedia.org/r/q/Iff6ef320017649750e5c6723a91ee298eb97a408"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Stored XSS in WikiSEO author and image properties on action=info",
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
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  },
  "cveMetadata": {
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    "assignerShortName": "wikimedia-foundation",
    "cveId": "CVE-2026-100243",
    "datePublished": "2026-09-29T16:43:00.209Z",
    "dateReserved": "2026-09-25T16:03:13.124Z",
    "dateUpdated": "2026-09-29T16:43:00.209Z",
    "state": "PUBLISHED"
  },
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    "epss": {
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      "date": "2026-09-30",
      "epss": "0.00155",
      "percentile": "0.04054"
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    "nvd": {
      "cve": {
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          {
            "affectedData": [
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                "defaultStatus": "unaffected",
                "product": "Mediawiki - WikiSEO Extension",
                "repo": "https://gerrit.wikimedia.org/g/mediawiki/extensions/WikiSEO/+/refs/heads/master",
                "vendor": "Wikimedia Foundation",
                "versions": [
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          }
        ],
        "id": "CVE-2026-100243",
        "lastModified": "2026-09-29T21:35:07.960",
        "metrics": {},
        "published": "2026-09-29T17:17:01.340",
        "references": [
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        "vulnStatus": "Awaiting Analysis",
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            "type": "Secondary"
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}



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