Vulnerability in OptimiDoc Server (On-Premise) software

CERT Polska has received a report about vulnerability in OptimiDoc Server (On-Premise) software and participated in coordination of its disclosure.

The vulnerabilityCVE-2026-15933: OptimiDoc Server (On-Premise) stores credentials for external services in cleartext. An authenticated administrator can view previously configured service passwords, including SMTP, FTP (for scan delivery), Active Directory (for user list import), and SharePoint credentials, in cleartext via the web administration panel page source, allowing exposure of sensitive third-party authentication data.

This issue was fixed in version 26.08

We thank Paweł Różański from securitum.com for the responsible vulnerability report.