Description

CERT Polska has received a report about vulnerabilities in Hydrosystem Control System software and participated in coordination of their disclosure.

The vulnerability CVE-2026-4901: Hydrosystem Control System saves sensitive information into a log file. Critically, user credentials are logged allowing the attacker to obtain further authorized access into the system. Combined with vulnerability CVE-2026-34184, these sensitive information could be accessed by an unauthorized user.

The vulnerability CVE-2026-34184: Hydrosystem Control System does not enforce authorization for some directories. This allows an unauthorized attacker to read all files in these directories and even execute some of them. Critically the attacker could run PHP scripts directly on the connected database.

The vulnerability CVE-2026-34185: Hydrosystem Control System is vulnerable to SQL Injection across most scripts and input parameters. Because no protections are in place, an authenticated attacker can inject arbitrary SQL commands, potentially gaining full control over the database.

These issues were fixed in version 9.8.5

Credits

We thank Jarosław "Jahrek" Kamiński from Securitum for the responsible vulnerability report.