Description
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. It is possible to use action=edit&undo= followed by action=mcrundo and action=mcrrestore to view private pages on a private wiki that has at least one page set in $wgWhitelistRead.
Remediation
References
Related Vulnerabilities
WordPress 5.4.x Multiple Vulnerabilities (5.4 - 5.4.1)
WordPress Plugin DethemeKit For Elementor Multiple Cross-Site Scripting Vulnerabilities (1.5.5.4)
WordPress 4.7.x Multiple Vulnerabilities (4.7 - 4.7.4)
Artifactory Incorrect Permission Assignment for Critical Resource Vulnerability (CVE-2021-41834)