# CVE-2023-32319: Basic auth header on WebDAV requests is not brute-force protected in Nextcloud

> Attackers can brute-force user credentials on WebDAV endpoints due to missing rate limiting, leading to account takeover.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 May 2023
- **Updated:** 14 Jan 2025
- **Also known as:** GHSA-mr7q-xf62-fw54

## What is CVE-2023-32319?

CVE-2023-32319 is a high-severity authentication bypass vulnerability in Nextcloud Nextcloud Server, published on 26 May 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Nextcloud server is an open source personal cloud implementation. Missing brute-force protection on the WebDAV endpoints via the basic auth header allowed to brute-force user credentials when the provided user name was not an email address. Users from version 24.0.0 onward are affected. This issue has been addressed in releases 24.0.11, 25.0.5 and 26.0.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2023-32319?

It affects 1 product.


Products: Nextcloud Nextcloud Server.

## How do I fix CVE-2023-32319?

No fix has been published for CVE-2023-32319 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-32319 being exploited?

There is no known exploitation of CVE-2023-32319 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-2023-32319 and fix it if it is affected.

What it is: CVE-2023-32319 is a high-severity authentication bypass vulnerability in Nextcloud Nextcloud Server, published on 26 May 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-32319 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-2023-32319/ (Markdown: https://insights.sbomify.com/CVE-2023-32319/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-32319
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-32319
- OSV: https://osv.dev/vulnerability/CVE-2023-32319

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-32319/
Summaries are generated and may contain mistakes; the official description above is the record.