Zoho ManageEngine OpManager 11 through 12.2 uses a custom encryption algorithm to protect the credential used to access the monitored devices. The implemented algorithm doesn't use a per-system key or even a salt; therefore, it's possible to create a universal decryptor.

An issue was discovered in ZOHO ManageEngine OpManager 12.2. The 'apiKey' parameter of "/api/json/admin/getmailserversettings" and "/api/json/dashboard/gotoverviewlist" is vulnerable to a Blind SQL Injection attack.

An issue was discovered in ZOHO ManageEngine OpManager 12.2. By adding a Google Map to the application, an authenticated user can upload an HTML file. This HTML file is then rendered in various locations of the application. JavaScript inside the uploaded HTML is also interpreted by the application. Thus, an attacker can inject a malicious JavaScript payload inside the HTML file and upload it to the application.

An issue was discovered in ZOHO ManageEngine OpManager 12.2. An authenticated user can upload any file they want to share in the "Group Chat" or "Alarm" section. This functionality can be abused by a malicious user by uploading a web shell.