SellKit <= 1.8.1 - Authenticated (Subscriber+) Arbitrary File Download
Strategic Overview
- Status
- Patched in 1.8.3
- Affected Version
<= 1.8.1- CVSS
- 6.5Medium
- Weakness type
- CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- CVE
CVE-2024-30509
At a glance
CVE-2024-30509 is a medium-severity Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in the SellKit WordPress plugin, affecting versions <= 1.8.1. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 1.8.3; sites on affected versions should update now. Disclosed March 2024, reported by stealthcopter.
Vulnerability Overview
The SellKit – Funnel builder and checkout optimizer for WooCommerce to sell more, faster plugin for WordPress is vulnerable to arbitrary file downloads in all versions up to, and including, 1.8.1. This is due to insufficient file validation in the handle_file_download function. This makes it possible for authenticated attackers, with subscriber-level access and above, to download arbitrary files.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality.
CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Reaching this weakness in SellKit <= 1.8.1 takes an account at Subscriber level or above. Path traversal happens when user-controlled text is used to build a filesystem path without being constrained to an intended directory, so sequences like ../ walk the resolved path somewhere else.
Depending on the operation, it means reading files outside the intended folder — wp-config.php being the usual target — or writing to and deleting paths the web server can touch. For SellKit the fix is 1.8.3: builds <= 1.8.1 are affected, anything from 1.8.3 onward is not.
Remediation
Update to version 1.8.3, or a newer patched version
How does WordSec protect against this?
An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: SellKit 1.8.3 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Other vulnerabilities in SellKit – Funnel builder and checkout optimizer for WooCommerce to sell more, faster
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