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.
{
    "severity": "Low",
    "cpes": [
        "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*"
    ]
}