Unknown · Opensis Classic · CVE-2026-8406
**Name of the Vulnerable Software and Affected Versions**
openSIS Classic version 9.3
**Description**
An insecure direct object reference in the messaging module allows authenticated users with access to that module to request sent-message details. This is achieved by supplying an arbitrary `mail id` value to the 'modules/messaging/SentMail.php' endpoint.
**Recommendations**
At the moment, there is no information about a newer version that contains a fix for this vulnerability.