A vulnerability, which was classified as problematic, has been found in OS4ED openSIS-Classic 9.3. This issue affects some unknown processing of the file modules/messaging/SentMail.php of the component Messaging Module. The manipulation leads to authorization bypass.
This vulnerability is referenced as CVE-2026-8406. Remote exploitation of the attack is possible. No exploit is available.
It is suggested to install a patch to address this issue.
