CVE-2025-65966
OneUptime Unauthorized User Creation via API
OneUptime is a solution for monitoring and managing online services. In version 9.0.5598, a low-permission user can create new accounts through a direct API request instead of being restricted to the intended interface. This issue has been patched in version 9.1.0.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
OneUptime Unauthorized User Creation via API
OneUptime is a solution for monitoring and managing online services. In version 9.0.5598, a low-permission user can create new accounts through a direct API request instead of being restricted to the intended interface. This issue has been patched in version 9.1.0.
- Record
CVE-2025-65966- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-285
- Updated
- 2026-11-02
EUVDEUVD-2025-199748
OneUptime is a solution for monitoring and managing online services. In version 9.0.5598, a low-permission user can create new accounts through a direct API request instead of being restricted to the intended interface. This issue has been patched in version 9.1.0.
- Record
EUVD-2025-199748- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-m449-vh5f-574g
OneUptime Unauthorized User Creation via API
Summary
A low-permission user can create new accounts through a direct API request instead of being restricted to the intended interface.
PoC
A low-permission user sends a crafted API request to the user-creation endpoint and the system creates the account successfully.
Impact
This allows attackers to create unauthorized accounts.
- Record
GHSA-m449-vh5f-574g- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-285
- Updated
- 2026-11-02
NVD
OneUptime is a solution for monitoring and managing online services. In version 9.0.5598, a low-permission user can create new accounts through a direct API request instead of being restricted to the intended interface. This issue has been patched in version 9.1.0.
- Record
CVE-2025-65966- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H - Weakness
- CWE-285
- Updated
- 2026-11-02
OSV
OneUptime Unauthorized User Creation via API
OneUptime is a solution for monitoring and managing online services. In version 9.0.5598, a low-permission user can create new accounts through a direct API request instead of being restricted to the intended interface. This issue has been patched in version 9.1.0.
- Record
CVE-2025-65966- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-285
- Updated
- 2026-11-02
OSVGHSA-m449-vh5f-574g
OneUptime Unauthorized User Creation via API
Summary
A low-permission user can create new accounts through a direct API request instead of being restricted to the intended interface.
PoC
A low-permission user sends a crafted API request to the user-creation endpoint and the system creates the account successfully.
Impact
This allows attackers to create unauthorized accounts.
- Record
GHSA-m449-vh5f-574g- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-285
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@oneuptime/commonnpm |
before 9.1.0 | 9.1.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-65966 is a high vulnerability (CVSS 8.8) in Hackerbay Oneuptime, published November 26, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. Fixed in @oneuptime/common 9.1.0.
References
github.com/OneUptime/oneuptime/security/advisories/GHSA-m449-vh5f-574g
nvd.nist.gov/vuln/detail/CVE-2025-65966