SB2026110561 - Improper access control in AlternativeCommerce PayPal Checkout module for Drupal
Published: November 5, 2026
Security Bulletin ID
SB2026110561
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2026-122069)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to the affected module does not sufficiently validate incoming PayPal webhook requests. A remote attacker can submit a specially crafted request and cause the associated order to be marked as paid without completing a payment.
Remediation
Install update from vendor's website.