Description
In MediaWiki before 1.31.8, 1.32.x and 1.33.x before 1.33.4, and 1.34.x before 1.34.2, private wikis behind a caching server using the img_auth.php image authorization security feature may have had their files cached publicly, so any unauthorized user could view them. This occurs because Cache-Control and Vary headers were mishandled.
Remediation
References
Related Vulnerabilities
WordPress Plugin Instagram Plugin-InstaLinker Cross-Site Scripting (1.1.1)
Jetty Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2009-5045)
WordPress Plugin Social Login by BestWebSoft Cross-Site Scripting (0.1)
WordPress Plugin Event Registration Multiple Vulnerabilities (6.02.03)