CVE-2025-66028 - CVE House
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Status published Medium CVE-2025-66028

OneUptime is Vulnerable to Privilege Escalation via Login Response Manipulation

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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CVE-2025-65966
OneUptime Unauthorized User Creation via API
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CVE-2024-29194
OneUptime Vulnerable to a Privilege Escalation via Local Storage Key Manipulation
High 8.3

Affected Vendor

Affected Software

oneuptime
Vulnerable Versions:
< 8.0.5567

Timeline

Official Publish: November 26th, 2025
Last Modified: November 26th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-284

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1078 Valid Accounts
Persistence
T1213 Data from Information Repositories
Collection
T1565.002 Stored Data Manipulation
Impact