# CVE-2023-25162: Nextcloud Server vulnerable to SSRF via filter bypass due to lax checking on IPs

> Attackers can bypass IP filters to perform SSRF and read sensitive metadata, particularly on AWS-hosted Nextcloud servers.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Feb 2023
- **Updated:** 10 Mar 2025
- **Also known as:** GHSA-mqrx-grp7-244m

## What is CVE-2023-25162?

CVE-2023-25162 is a medium-severity server-side request forgery vulnerability in Nextcloud Nextcloud Server, published on 13 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Nextcloud Server prior to 24.0.8 and 23.0.12 and Nextcloud Enterprise server prior to 24.0.8 and 23.0.12 are vulnerable to server-side request forgery (SSRF). Attackers can leverage enclosed alphanumeric payloads to bypass IP filters and gain SSRF, which would allow an attacker to read crucial metadata if the server is hosted on the AWS platform. Nextcloud Server 24.0.8 and 23.0.2 and Nextcloud Enterprise Server 24.0.8 and 23.0.12 contain a patch for this issue. No known workarounds are available.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2023-25162?

It affects 1 product.


Products: Nextcloud Nextcloud Server.

## How do I fix CVE-2023-25162?

No fix has been published for CVE-2023-25162 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-25162 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-25162 exists.

## 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-2023-25162 and fix it if it is affected.

What it is: CVE-2023-25162 is a medium-severity server-side request forgery vulnerability in Nextcloud Nextcloud Server, published on 13 Feb 2023. 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-2023-25162 exists.

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-2023-25162/ (Markdown: https://insights.sbomify.com/CVE-2023-25162/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-25162
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-25162
- OSV: https://osv.dev/vulnerability/CVE-2023-25162

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-25162/
Summaries are generated and may contain mistakes; the official description above is the record.