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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @oneuptime/common | < 8.0.5567 | 8.0.5567 |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-284, CWE-863- Platform
- npm
- Package
@oneuptime/common- Disclosed
- 25.11.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-675q-66gf-gqg8 - CC BY 4.0
Vulnerability history: @oneuptime/common
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 11
- First → latest
- 11.2025 03.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 6
- High 3
- Medium 2
Disclosures per year
- 2025: 2
- 2026: 9
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