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

> Low-permission users can create new accounts via direct API requests, bypassing intended interface restrictions in OneUptime.

- **Severity:** High 8.8 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 26 Nov 2025
- **Updated:** 26 Nov 2025
- **Also known as:** GHSA-m449-vh5f-574g

## What is CVE-2025-65966?

CVE-2025-65966 is a high-severity missing authorization vulnerability in oneuptime, published on 26 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2025-65966?

2 open source packages ship an affected version, including @oneuptime/common. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `@oneuptime/common` | npm | All versions | 9.1.0 |
| `@oneuptime/common` | npm | All versions | 9.1.0 |

Products: Hackerbay Oneuptime.

## How do I fix CVE-2025-65966?

Upgrade @oneuptime/common to 9.1.0 or later.

## Is CVE-2025-65966 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-65966 exists.

## Other vulnerabilities in oneuptime

- [CVE-2026-33396](https://insights.sbomify.com/CVE-2026-33396/): Code injection in oneuptime (critical 10.0)
- [CVE-2026-32306](https://insights.sbomify.com/CVE-2026-32306/): OneUptime ClickHouse SQL Injection via Aggregate Query Parameters (critical 10.0)
- [CVE-2026-30956](https://insights.sbomify.com/CVE-2026-30956/): OneUptime has authorization bypass via client‑controlled is-multi-tenant-query header (critical 10.0)
- [CVE-2026-30957](https://insights.sbomify.com/CVE-2026-30957/): OneUptime Synthetic Monitor RCE via exposed Playwright browser object (critical 10.0)
- [CVE-2026-30887](https://insights.sbomify.com/CVE-2026-30887/): OneUptime Affected by Unsandboxed Code Execution in Probe Allows Any Project Member to Achieve RCE (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-65966 and fix it if it is affected.

What it is: CVE-2025-65966 is a high-severity missing authorization vulnerability in oneuptime, published on 26 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-65966 exists.

Affected packages and fixed versions:
- @oneuptime/common (npm): affected all versions; fixed in 9.1.0
- @oneuptime/common (npm): affected all versions; fixed in 9.1.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-65966/ (Markdown: https://insights.sbomify.com/CVE-2025-65966/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-65966
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-65966
- OSV: https://osv.dev/vulnerability/CVE-2025-65966

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-65966/
Summaries are generated and may contain mistakes; the official description above is the record.