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    CVE-2023-37252

    An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. Special:CheckUserLog shows usernames that have been hidden.

    Published:Sep 14, 2026
    Last Modified:Sep 15, 2026
    EPS:Sep 14, 2026
    EPSS Score:0.00197
    CVSS Score:3.1

    Affected Products

    Vendor
    Mediawiki
    Product
    Checkuser

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-34090 (CVSS 4.8) — Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation CheckUser. T…
    CVE-2025-67478 (CVSS 0) — Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files includes/…
    CVE-2025-61658 (CVSS 1.3) — Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Globa…
    CVE-2025-61651 (CVSS 0) — Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in W…
    CVE-2025-61648 (CVSS 0) — Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in W…
    CVE-2025-62699 (CVSS 6.9) — Exposure of Sensitive Information to an Unauthorized Actor vulnerability in The Wikimedia Foundation Mediawiki…
    CVE-2019-16529 (CVSS 5.3) — An issue was discovered in the CheckUser extension through 1.35.0 for MediaWiki. Oversighted edit summaries ar…
    CVE-2019-18611 (CVSS 6.5) — An issue was discovered in the CheckUser extension through 1.34 for MediaWiki. Certain sensitive information w…
    CVE-2015-2940 (CVSS 6.8) — Cross-site request forgery (CSRF) vulnerability in the CheckUser extension for MediaWiki allows remote attacke…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High