CVE-2026-100380 (GCVE-0-2026-100380)

Vulnerability from cvelistv5 – Published: 2026-09-25 20:58 – Updated: 2026-09-25 20:58
VLAI
Title
Reflected XSS in Wikibase Special:SetLabel language validation
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - Wikibase Extension allows Cross-Site Scripting (XSS). This issue affects Mediawiki - Wikibase Extension: from * before 1.46.1, 1.45.5, 1.43.10.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
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 - Wikibase Extension Affected: * , < 1.46.1, 1.45.5, 1.43.10 (semver)
guessed Create a notification for this product.
Credits
Marco Paciaroni (bombobombone)
Show details on NVD website
To clipboard 

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          "repo": "https://gerrit.wikimedia.org/g/mediawiki/extensions/Wikibase/+/refs/heads/master",
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        "orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
        "shortName": "wikimedia-foundation"
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          "url": "https://phabricator.wikimedia.org/T434549"
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          "url": "https://gerrit.wikimedia.org/r/q/I7407f9748d72161ce25ad0ba2446869bb1776857"
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      ],
      "source": {
        "discovery": "UNKNOWN"
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      "title": "Reflected XSS in Wikibase Special:SetLabel language validation",
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    "cveId": "CVE-2026-100380",
    "datePublished": "2026-09-25T20:58:24.004Z",
    "dateReserved": "2026-09-25T19:28:11.982Z",
    "dateUpdated": "2026-09-25T20:58:24.004Z",
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                "Recovery": "NOT_DEFINED",
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                "exploitMaturity": "NOT_DEFINED",
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                "modifiedAttackComplexity": "NOT_DEFINED",
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                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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