Vulnerability in Hackerbay Oneuptime
CVE-2025-66028
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.
EPSS: 0.003 (21.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
Affected products
- Hackerbay Oneuptime
- Oneuptime — versions < 8.0.5567
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-66028?
- CVE-2025-66028 is a high-severity vulnerability in Hackerbay Oneuptime, classified under Improper Access Control. CVSS score: 8.2/10. Published 2025-11-26.
- How severe is CVE-2025-66028?
- High severity. CVSS v3 base score is 8.2 out of 10.