{"cve":"CVE-2023-37300","nvd":{"published":"2023-06-30T17:15:09.477","modified":"2026-06-17T06:07:55.277","status":"Modified","description":"An issue was discovered in the CheckUserLog API in the CheckUser extension for MediaWiki through 1.39.3. There is incorrect access control for visibility of hidden users.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-863"],"references":["https://gerrit.wikimedia.org/r/q/I993fdcae1fedb7dd543b35a477026bc727615b0a","https://phabricator.wikimedia.org/T330968","https://gerrit.wikimedia.org/r/q/I993fdcae1fedb7dd543b35a477026bc727615b0a","https://phabricator.wikimedia.org/T330968"],"products":["mediawiki:mediawiki"],"source":"nvd","synced_at":"2026-10-19T21:38:30.124994567+00:00"},"epss":{"cve":"CVE-2023-37300","score":0.00672,"percentile":0.5209,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}