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Privilege Escalation via Login Response Manipulation

High
simlarsen published GHSA-675q-66gf-gqg8 Nov 25, 2025

Package

OneUptime

Affected versions

8.0.5581

Patched versions

None

Description

Summary

During the login process, the server response included a parameter called
isMasterAdmin. By intercepting and modifying this parameter value from false to
true, I was able to gain access to the admin dashboard interface.
However, despite accessing the admin panel, I did not have sufficient permissions
to view or interact with actual data.

PoC

Intercept the login response and change "isMasterAdmin": false → "isMasterAdmin": true
image
2

Impact

I was able to view the admin dashboard

Severity

High

CVE ID

CVE-2025-66028

Weaknesses

Improper Access Control

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Learn more on MITRE.

Credits