Description In MediaWiki through 1.37, blocked IP addresses are allowed to edit EntitySchema items. Remediation References CVE-2021-45471 Related Vulnerabilities WordPress Plugin Broken Link Manager Multiple Vulnerabilities (0.4.5) WordPress Plugin WP-reCAPTCHA Cross-Site Scripting (3.1.3) Django Buffer Access with Incorrect Length Value Vulnerability (CVE-2026-53877) DOMPurify Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2026-49458) MySQL CVE-2018-3081 Vulnerability (CVE-2018-3081) Severity Medium Classification CVE-2021-45471 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Tags Missing Update Known Vulnerabilities