CVE-2025-13776: Hard-coded database credentials in Finka software

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-24 · updated 2026-06-17
Weakness: CWE-798

Description

Multiple Finka programs use hard-coded Firebird database credentials (shared across all instances of this software). A malicious attacker in local network who knows default credentials is able to read and edit database content. This vulnerability has been fixed in version: Finka-FK 18.5, Finka-KPR 16.6, Finka-Płace 13.4, Finka-Faktura 18.3, Finka-Magazyn 8.3, Finka-STW 12.3

Affected products

Finka-Faktura: before 18.3 — fixed in 18.3
Finka-Fk: before 18.5 — fixed in 18.5
Finka-Kpr: before 16.6 — fixed in 16.6
Finka-Magazyn: before 8.3 — fixed in 8.3
Finka-Place: before 13.4 — fixed in 13.4
Finka-Stw: before 12.3 — fixed in 12.3

How to fix

Upgrade to a fixed version: Finka-Faktura 18.3; Finka-Fk 18.5; Finka-Kpr 16.6; Finka-Magazyn 8.3; Finka-Place 13.4; Finka-Stw 12.3. Check the vendor advisory for mitigations.

References

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