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TI-2026-03464 Aliases CVE-2026-4001GHSA-2qpc-rpxq-phv6

Woocommerce Custom Product Addons Pro <= 5.4.1 - Unauthenticated Remote Code Execution via Custom Pricing Formula

Priority MEDIUM 50CWE-95Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-95.

Summary

The Woocommerce Custom Product Addons Pro plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 5.4.1 via the custom pricing formula eval() in the process_custom_formula() function within includes/process/price.php. This is due to insufficient sanitization and validation of user-submitted field values before passing them to PHP's eval() function. The sanitize_values() method strips HTML tags but does not escape single quotes or prevent PHP code injection. This makes it possible for unauthenticated attackers to execute arbitrary code on the server by submitting a crafted value to a WCPA text field configured with custom pricing formula (pricingType: "custom" with {this.value}).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00878 59th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
acowebsWoocommerce Custom Product Addons Proup to 5.4.1—No fix listedCNA
  • Woocommerce Custom Product Addons Pro Vendoracowebs Affected up to 5.4.1 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-4001
  2. 2026-10-03 Alias added: GHSA-2qpc-rpxq-phv6

References

Other 2

  • TI-2024-11231 Product Labels For Woocommerce < 1.5.9 - Admin+ SQLi CVSS 3.1MEDIUM 4.1
  • TI-2024-09859 Product Labels For Woocommerce < 1.5.11 - Admin+ SQLi CVSS 3.1MEDIUM 4.1
  • TI-2025-30085 WordPress Dynamic Pricing With Discount Rules for WooCommerce plugin <= 4.5.9 - Arbitrary Code Execution vulnerability CVSS 3.1CRITICAL 9.1
  • TI-2024-01650 PDF Invoices and Packing Slips For WooCommerce <= 1.3.7 - Authenticated (Subscriber+) PHP Object Injection CVSS 3.1HIGH 8.8
  • TI-2025-38331 WordPress Product Table For WooCommerce plugin <= 1.2.4 - PHP Object Injection vulnerability CVSS 3.1HIGH 8.8
  • TI-2024-19976 WordPress PDF Invoices and Packing Slips For WooCommerce plugin <= 1.3.7 - PHP Object Injection vulnerability CVSS 3.1HIGH 8.8
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences