CVE-2026-51926
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk28th percentile - higher than 28% of all known CVEs
Summary
An issue in FSM Client v.11.11c by docuForm GmbH allows a remote attacker to obtain sensitive information via the login.php component. The authentication mechanism enables user enumeration through variations in server responses.
Risk Assessment
An attacker can identify existing user accounts, facilitating brute-force or credential stuffing attacks and increasing the risk of unauthorized system access.
Recommendation
Update FSM Client to the latest version immediately and implement measures to prevent user enumeration, such as uniform login error messages.
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Original NVD description (English source)
An issue in docuForm GmbH FSM Client v.11.11c allows a remote attacker to obtain sensitive information via the login.php component. A vulnerability was identified in the authentication mechanism that allows user enumeration through the login interface. An attacker can differentiate between valid and invalid usernames based on variations in server responses. This information can be leveraged to identify existing accounts and facilitate further attacks, including brute-force or credential stuffing.

