CVE-2026-8803: Use of Weak Hash in opensourcepos Open Source Point of Sale
A flaw has been found in opensourcepos Open Source Point of Sale up to 3.4.2. Impacted is the function Login of the file app/Models/Employee.php of the component Employee Login. This manipulation causes use of weak hash. Remote exploitation of the attack is possible. The attack is considered to have high complexity. The exploitability is considered difficult. The actual existence of this vulnerability is currently in question. The vendor explains: "[T]he code is still there to allow the upgrade path to work. The default password is initially seeded with the old hash function, but then migrated to a newer one after login. [T]he hash version check might be cleaned up in the future. Currently it's not actively in use as any password change will use a newer hash function."
AI Analysis
Technical Summary
This vulnerability involves the use of a weak hashing algorithm in the Employee Login function of Open Source Point of Sale (versions 3.4.0 to 3.4.2). The weak hash is present to maintain compatibility during upgrades, with initial default passwords seeded using the old hash. Upon login, passwords are migrated to a stronger hash function. The vendor indicates that the weak hash mechanism is not actively used for password changes and may be removed in future versions. The vulnerability has a CVSS 4.0 score of 6.3, reflecting medium severity, with high attack complexity and difficult exploitability. No patch or official remediation level has been provided yet.
Potential Impact
The use of a weak hash function could potentially allow attackers to compromise password security if they can exploit the legacy hashing mechanism. However, since passwords are migrated to a stronger hash after login and the weak hash is not actively used for new password changes, the practical impact is limited. The attack requires high complexity and is difficult to exploit remotely. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The vendor notes that the weak hash code is retained only for upgrade compatibility and is not actively used for new or changed passwords. Users should monitor vendor communications for updates or future removal of the weak hash code. No immediate action is required unless directed by the vendor.
CVE-2026-8803: Use of Weak Hash in opensourcepos Open Source Point of Sale
Description
A flaw has been found in opensourcepos Open Source Point of Sale up to 3.4.2. Impacted is the function Login of the file app/Models/Employee.php of the component Employee Login. This manipulation causes use of weak hash. Remote exploitation of the attack is possible. The attack is considered to have high complexity. The exploitability is considered difficult. The actual existence of this vulnerability is currently in question. The vendor explains: "[T]he code is still there to allow the upgrade path to work. The default password is initially seeded with the old hash function, but then migrated to a newer one after login. [T]he hash version check might be cleaned up in the future. Currently it's not actively in use as any password change will use a newer hash function."
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves the use of a weak hashing algorithm in the Employee Login function of Open Source Point of Sale (versions 3.4.0 to 3.4.2). The weak hash is present to maintain compatibility during upgrades, with initial default passwords seeded using the old hash. Upon login, passwords are migrated to a stronger hash function. The vendor indicates that the weak hash mechanism is not actively used for password changes and may be removed in future versions. The vulnerability has a CVSS 4.0 score of 6.3, reflecting medium severity, with high attack complexity and difficult exploitability. No patch or official remediation level has been provided yet.
Potential Impact
The use of a weak hash function could potentially allow attackers to compromise password security if they can exploit the legacy hashing mechanism. However, since passwords are migrated to a stronger hash after login and the weak hash is not actively used for new password changes, the practical impact is limited. The attack requires high complexity and is difficult to exploit remotely. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The vendor notes that the weak hash code is retained only for upgrade compatibility and is not actively used for new or changed passwords. Users should monitor vendor communications for updates or future removal of the weak hash code. No immediate action is required unless directed by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-18T04:37:54.529Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0b00d0ec166c07b0ae67da
Added to database: 5/18/2026, 12:06:40 PM
Last enriched: 5/18/2026, 12:21:44 PM
Last updated: 5/20/2026, 8:33:34 PM
Views: 19
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