An issue was discovered in OPC cardsystems Webapp Aufwertung 2.1.0. The reference assigned to transactions can be reused. When completing a payment, the first or all transactions with the same reference are completed, depending on timing. This can be used to transfer more money onto employee cards than is paid.
Conclusion & alert: CVE-2025-30073 is rated Low Risk (37.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.29%).Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
Exploit prediction scoring system (EPSS) score for CVE-2025-30073
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).