elFinder: ZIP extraction bypasses uploadDeny MIME filter allowing PHP file upload (RCE)
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.1epss 0.9%
exploitation probability
0.9%top 42% of all CVEs
observed exploitation
nono source reports it
elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, checkExtractItems() in php/elFinderVolumeDriver.class.php calls mimetypeInternalDetect() without passing the result through mimeTypeNormalize(). Because the .phtml, .phar, .php5, and .php3 extensions are absent from mime.types, the staticMimeMap entries that map them to text/x-php are not applied, and allowPutMime() permits extraction even when uploadDeny blocks text/x-php. An attacker with ZIP upload permission can extract PHP-executable files into a web-accessible files/ directory and achieve remote code execution when the server executes those extensions. This issue is fixed in version 2.1.70.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Studio-42 · elFinderReferences
https://github.com/Studio-42/elFinder/commit/191372c1bbebbd36fb55af79a84b9984861390ffhttps://github.com/Studio-42/elFinder/commit/dd73e702820c146a192969800ee674ecdb208365https://github.com/Studio-42/elFinder/releases/tag/2.1.70https://github.com/Studio-42/elFinder/security/advisories/GHSA-gxmj-r5rf-ggwq