OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0, the Message Center accepts the URL parameter show_all=yes and passes it to getPnotesByUser(), which returns all internal messages (all users’ notes). The backend does not verify that the requesting user is an administrator before honoring show_all=yes. The "Show All" link is also visible to non-admin users. As a result, any authenticated user can view the entire internal message list by requesting messages.php?show_all=yes. Version 8.0.0 patches the issue.
Exploitability
AV:NAC:LAT:NPR:LUI:NVulnerable System
VC:HVI:NVA:NSubsequent System
SC:NSI:NSA:N5.7/CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:POther