CVE-2025-66028: OneUptime is Vulnerable to Privilege Escalation via Login Response Manipulation
Summary
During the login process, the server response included a parameter called isMasterAdmin. By intercepting and modifying this parameter value from false to true, a user is able to gain access to the admin dashboard interface. However, despite accessing the admin panel, the user does not have sufficient permissions to view or interact with actual data.
PoC Intercept the login response and change "isMasterAdmin": false → "isMasterAdmin": true <img width="1405" height="567" alt="image" src="https://github.com/user-attachments/assets/7036398b-bb41-46c1-b66a-e49ec2bc3abb" /> <img width="1533" height="476" alt="2" src="https://github.com/user-attachments/assets/4efcaef5-a939-4729-be43-3af62a7d02f8" />
Impact The admin dashboard is viewable.
Other sources
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.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2025-66028?
CVE-2025-66028 has a medium severity rating due to its potential for privilege escalation.
How do I fix CVE-2025-66028?
To fix CVE-2025-66028, upgrade OneUptime to version 8.0.5567 or later.
What products are affected by CVE-2025-66028?
CVE-2025-66028 affects OneUptime versions prior to 8.0.5567.
What type of vulnerability is CVE-2025-66028?
CVE-2025-66028 is a privilege escalation vulnerability caused by Login Response Manipulation.
When was CVE-2025-66028 disclosed?
CVE-2025-66028 was disclosed in 2025, prior to the release of version 8.0.5567.