M4 PDF plugin for Prestashop sites, in its 3.2.3 version and before, is vulnerable to a directory traversal vulnerability. The “f” parameter is not properly checked in the resource /m4pdf/pdf.php, returning any file given its relative path. An attacker that exploits this vulnerability could download /etc/passwd from the server if the file exists.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
| Link | Tags |
|---|---|
| https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-m4-pdf-plugin-prestashop-sites | third party advisory |