CVE-2025-66028 MEDIUM

CVE-2025-66028: OneUptime is Vulnerable to Privilege Escalation via Login Response Manipulation

Vendor Oneuptime
Product oneuptime
Weakness CWE-284
Published November 26, 2025
Last update November 26, 2025

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

OneUptime is a solution for monitoring and managing online services. Prior to version 8.0.5567, OneUptime is vulnerable to privilege escalation via Login Response Manipulation. During the login process, the server response included a parameter called isMasterAdmin. By intercepting and modifying this parameter value from false to true, it is possible to gain access to the admin dashboard interface. However, an attacker may be unable to view or interact with the data if they still do not have sufficient permissions. This issue has been patched in version 8.0.5567.

Key dates

02Disclosure timeline

November 26, 2025 CVE published
November 26, 2025 Record updated