Client-Side Authentication Vulnerability in Płatnik by ZUS
CVE-2026-110972

8.6HIGH

Key Information:

Vendor

Zakład Ubezpieczeń Społecznych

Status
Płatnik
Vendor
CVE Published:
30 October 2026

What is CVE-2026-110972?

A vulnerability in Płatnik allows attackers with access to any instance of the application connected to the backend server to circumvent the authentication process. This flaw enables unauthorized access by leveraging client-side authentication mechanisms, allowing attackers to authenticate as any user without proper verification. The issue was rectified in version 10.02.002 of Płatnik, emphasizing the importance of timely updates to mitigate security risks.

Affected Version(s)

Płatnik 0 <= 10.02.002

References

https://cert.pl/posts/2026/10/CVE-2026-110970
third-party-advisory
https://www.zus.pl/firmy/program-platnik/o-programie-platnik
product

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wojciech Giełda
.