# CVE-2024-22403: OAuth2 authorization codes are valid indefinetly in Nextcloud server

> Attackers can hijack user accounts by reusing intercepted OAuth2 authorization codes that never expire in Nextcloud server.

- **Severity:** Low 3.0 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Jan 2024
- **Updated:** 17 Jun 2025
- **Also known as:** GHSA-wppc-f5g8-vx36

## What is CVE-2024-22403?

CVE-2024-22403 is a low-severity authentication bypass vulnerability in Nextcloud Nextcloud Server, published on 18 Jan 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Nextcloud server is a self hosted personal cloud system. In affected versions OAuth codes did not expire. When an attacker would get access to an authorization code they could authenticate at any time using the code. As of version 28.0.0 OAuth codes are invalidated after 10 minutes and will no longer be authenticated. To exploit this vulnerability an attacker would need to intercept an OAuth code from a user session. It is recommended that the Nextcloud Server is upgraded to 28.0.0. There are no known workarounds for this vulnerability.

Weakness: CWE-613 (DEPRECATED: Insufficient Session Expiration)

## Which versions are affected by CVE-2024-22403?

It affects 1 product.


Products: Nextcloud Nextcloud Server.

## How do I fix CVE-2024-22403?

No fix has been published for CVE-2024-22403 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-22403 being exploited?

There is no known exploitation of CVE-2024-22403 in the wild and no public exploit code.

## Other vulnerabilities in Nextcloud Nextcloud Server

- [CVE-2021-32802](https://insights.sbomify.com/CVE-2021-32802/): Preview generation used third-party library not suited for user-generated content in Nextcloud server (critical 9.3)
- [CVE-2023-26482](https://insights.sbomify.com/CVE-2023-26482/): Scope of workflow operations is not validated in nextcloud server (critical 9.1)
- [CVE-2018-3775](https://insights.sbomify.com/CVE-2018-3775/): Auth bypass in Nextcloud Server (high 8.8)
- [CVE-2023-35172](https://insights.sbomify.com/CVE-2023-35172/): Nextcloud Server password reset endpoint is not brute force protected (high 8.7)
- [CVE-2023-32320](https://insights.sbomify.com/CVE-2023-32320/): Nextcloud Server's brute force protection allows someone to send more requests than intended (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-22403 and fix it if it is affected.

What it is: CVE-2024-22403 is a low-severity authentication bypass vulnerability in Nextcloud Nextcloud Server, published on 18 Jan 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-22403 in the wild and no public exploit code.

Affected product: Nextcloud Nextcloud Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2024-22403/ (Markdown: https://insights.sbomify.com/CVE-2024-22403/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-22403
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-22403
- OSV: https://osv.dev/vulnerability/CVE-2024-22403

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-22403/
Summaries are generated and may contain mistakes; the official description above is the record.