An issue in youdiancms v.9.5.20 and before allows a remote attacker to escalate privileges via the sessionID parameter in the index.php file.
https://gist.github.com/yahaha9/720fb45bbebda62dc198568c8d275df8
Source: Mitre, NVD
Published: 2025-01-27
Updated: 2025-06-27
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.00139