The WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 4.9.8 via the get_image_src_in_base64 function. This makes it possible for authenticated attackers, with subscriber-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information. The base64-encoded file contents are embedded into the cached invoice HTML and served directly to the attacker via the plugin's own Print/Download invoice endpoints, which require only a valid nonce and access key.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 6
https://plugins.trac.wordpress.org/browser/print-invoices-packing-slip-labels-f…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/print-invoices-packing-slip-labels-f…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/print-invoices-packing-slip-labels-f…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/print-invoices-packing-slip-labels-f…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3646629/print-invoices-packing-sli…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/a46f270f-d9cb-4bc1-8e…
security@wordfence.com