critical CVSS 9.8

CVE-2024-8030·PHP vulnerability

The Ultimate Store Kit Elementor Addons, Woocommerce Builder, EDD Builder, Elementor Store Builder, Product Grid, Product Table, Woocommerce Slider plugin is vulnerable to PHP Object Injection via deserialization of untrusted input via the _ultimate_store_kit_wishlist cookie in versions up to , and including, 2.0.3. This makes it possible for an unauthenticated attacker to inject a PHP Object. No POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker or above to delete arbitrary files, retrieve sensitive data, or execute code.

Severity
critical
Software
PHP
Fixed in
2.0.4
Published
2024-08-28

Affected versions

Until: 2.0.4

Fixed in: 2.0.4

How to fix this CVE

Update the Ultimate Store Kit Elementor Addons plugin to version 2.0.4 or later immediately. This plugin version contains a PHP object deserialization flaw in the _ultimate_store_kit_wishlist cookie that allows unauthenticated attackers to inject malicious objects. While the plugin alone cannot execute arbitrary code, the presence of additional vulnerable plugins or themes could enable remote code execution or data theft.

sudo dnf update php

Defensia detects this vulnerability

What an exploitation attempt looks like

Sample log line indicative of exploitation attempts:

POST/GET requests with _ultimate_store_kit_wishlist cookie containing serialized PHP objects; regex pattern: Cookie:.*_ultimate_store_kit_wishlist=.*O:\d+:".*":.*\{

WAF mitigation (if patching is not yet possible)

Add this rule to your WAF to block exploitation attempts while you schedule the patch. 

Block or inspect HTTP requests containing the _ultimate_store_kit_wishlist cookie with PHP serialized object patterns (starting with 'O:' followed by class name). Implement strict input validation to reject serialized object payloads and rate-limit requests from single IPs attempting multiple cookie injections.

How to check if you are affected

  1. Check installed PHP version: php -v
  2. Verify if Ultimate Store Kit plugin is installed: grep -r 'ultimate-store-kit' /path/to/wordpress/wp-content/plugins/
  3. Identify plugin version: grep -r 'Version:' /path/to/wordpress/wp-content/plugins/ultimate-store-kit/ultimate-store-kit.php | head -1
  4. Search web server access logs for requests containing '_ultimate_store_kit_wishlist' cookie: grep '_ultimate_store_kit_wishlist' /var/log/apache2/access.log or /var/log/nginx/access.log
  5. Verify plugin update to version 2.0.4+: ls -la /path/to/wordpress/wp-content/plugins/ultimate-store-kit/ and confirm version matches

FAQ

What is CVE-2024-8030?

CVE-2024-8030 is a PHP object injection vulnerability in the Ultimate Store Kit Elementor Addons plugin through version 2.0.3, where untrusted user input is deserialized via the _ultimate_store_kit_wishlist cookie without validation. An attacker can inject arbitrary PHP objects to trigger unintended behavior if additional vulnerable gadget chains exist in the environment.

Is CVE-2024-8030 being actively exploited?

As of the latest CISA advisories, CVE-2024-8030 is not listed as actively exploited in the wild, and no public exploit code has been released. However, the critical CVSS 9.8 score and unauthenticated attack vector warrant immediate patching.

What versions of the Ultimate Store Kit plugin are affected by CVE-2024-8030?

All versions up to and including 2.0.3 are vulnerable. Version 2.0.4 and later contain the necessary fixes.

How do I check if my WordPress site is vulnerable to CVE-2024-8030?

Use grep to find the plugin version: grep -A5 'Version:' /path/to/wordpress/wp-content/plugins/ultimate-store-kit/ultimate-store-kit.php. If the version is 2.0.3 or lower, your site is vulnerable.

Can the vulnerability be exploited without additional plugins?

No—the plugin itself contains no usable PHP gadget chain. However, if your WordPress installation includes other vulnerable plugins or themes with gadget chains, an attacker could chain them to achieve code execution or data theft.

Does Defensia detect CVE-2024-8030?

Yes — Defensia's CVE advisory scanner compares installed plugin and PHP package versions against the NVD database. If the Ultimate Store Kit plugin or PHP is installed on a monitored server, CVE-2024-8030 will appear in your dashboard with remediation steps.

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References

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