CVE-2025-66028HIGH 8.2EPSS p17.1%

CVE-2025-66028CVE-2025-66028

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.

Scoring

CVSS 3.18.2 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
EPSS0.26% probability of exploitation · percentile 17.1% · 2026-06-19T12:03:05Z
Published2025-11-26
Last modified2025-12-05

Underlying weaknesses· 1

CWE-284

References

  1. https://github.com/OneUptime/oneuptime/commit/3e72b2a9a4f50f98cf1f6cf13fa3e405715bb370
  2. https://github.com/OneUptime/oneuptime/security/advisories/GHSA-675q-66gf-gqg8

1

TypeTargetConfidenceTier
WeaknessImproper Access Controlcwe-2840%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.