CVE-2026-0750 in Commerce Paybox
Summary
by MITRE • 01/28/2026
Improper Verification of Cryptographic Signature vulnerability in Drupal Drupal Commerce Paybox Commerce Paybox on Drupal 7.X allows Authentication Bypass.This issue affects Drupal Commerce Paybox: from 7-x-1.0 through 7.X-1.5.
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Analysis
by VulDB Data Team • 03/09/2026
The vulnerability identified as CVE-2026-0750 represents a critical improper verification of cryptographic signature flaw within the Drupal Commerce Paybox module for Drupal 7.x systems. This weakness specifically impacts versions ranging from 7.x-1.0 through 7.x-1.5, creating a significant security risk that can be exploited to bypass authentication mechanisms. The issue stems from inadequate validation of cryptographic signatures during payment processing transactions, which directly undermines the integrity and authenticity guarantees that should be maintained in financial transaction systems.
The technical flaw manifests when the Drupal Commerce Paybox module fails to properly verify the authenticity of cryptographic signatures associated with payment requests and responses. This improper verification allows malicious actors to craft forged payment notifications or manipulate transaction data without detection. The vulnerability operates at the cryptographic validation layer, where expected signature verification routines are either bypassed entirely or implemented with insufficient security controls. According to CWE classification, this maps to CWE-322 which specifically addresses the weakness of key exchange without authentication, and CWE-347 which deals with improper verification of cryptographic signatures. The flaw essentially creates a trust boundary violation where the system cannot reliably distinguish between legitimate and malicious payment communications.
Operationally, this vulnerability enables attackers to achieve authentication bypass by manipulating payment responses that are supposed to be cryptographically signed and verified. An attacker could potentially submit fraudulent payment notifications that appear legitimate to the system, allowing unauthorized access to payment processing functions or manipulation of transaction records. The impact extends beyond simple authentication bypass to potentially enable financial fraud, data manipulation, and unauthorized transaction processing within the commerce platform. This vulnerability directly violates the principles of authentication and integrity as defined in the NIST Cybersecurity Framework and can be categorized under ATT&CK technique T1550.002 which focuses on use of valid accounts for privilege escalation and access bypass.
Mitigation strategies should begin with immediate deployment of patched versions of the Drupal Commerce Paybox module, specifically versions beyond 7.x-1.5 where the cryptographic signature verification has been properly implemented. Organizations must also implement additional monitoring and logging of payment transaction activities to detect anomalous patterns that might indicate exploitation attempts. Network segmentation and access controls should be reinforced around payment processing systems to limit the attack surface. Security teams should conduct thorough vulnerability assessments of all Drupal installations and related commerce modules to identify potential similar weaknesses. Regular security updates and patch management processes must be enforced across all Drupal environments to prevent future occurrences of such cryptographic verification failures. The remediation process should also include cryptographic audit procedures to validate that signature verification mechanisms are functioning correctly and that proper key management practices are maintained throughout the payment processing pipeline.