High (7.5) in os4ed opensis. EPSS 3.6% chance of exploitation in the next 30 days.
The Community Edition version 9.0 of OS4ED's openSIS Classic allows remote attackers to read arbitrary files via a directory traversal vulnerability in the 'filename' parameter of 'DownloadWindow.php'.
Severity
CVSS 3.1
7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
3.6% chance of exploitation in the next 30 days; higher than 89% of CVEs (scores of 2026-10-31)