Auth bypass in Opensourcepos Open Source Point Of Sale
CVE-2026-33730
Open Source Point of Sale (opensourcepos) is a web based point of sale application written in PHP using CodeIgniter framework. Prior to version 3.4.2, an Insecure Direct Object Reference (IDOR) vulnerability allows an authenticated low-privileged user to access the password change functionality of other users, including administrators, by manipulating the `employee_id` parameter. The application does not verify object ownership or enforce authorization checks. Version 3.4.2 adds object-level authorization checks to validate that the current user owns the employee_id being accessed.
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.003 (19.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Opensourcepos Open_source_point_of_sale
- Opensourcepos — versions < 3.4.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-33730?
- CVE-2026-33730 is a medium-severity vulnerability in Opensourcepos Open Source Point Of Sale, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-03-27.
- How severe is CVE-2026-33730?
- Medium severity. CVSS v3 base score is 6.5 out of 10.