# CVE-2019-5476: SQL injection in lookup.nextcloud.com

> Unauthenticated attackers can execute arbitrary SQL commands on the Nextcloud Lookup Server, potentially compromising data integrity and confidentiality.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Aug 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-h4m7-r8c6-ccr3

## What is CVE-2019-5476?

CVE-2019-5476 is a critical SQL injection vulnerability in lookup.nextcloud.com, published on 7 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An SQL Injection in the Nextcloud Lookup-Server < v0.3.0 (running on https://lookup.nextcloud.com) caused unauthenticated users to be able to execute arbitrary SQL commands.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2019-5476?

It affects 1 product.


Products: Nextcloud Lookup-Server.

## How do I fix CVE-2019-5476?

No fix has been published for CVE-2019-5476 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-5476 being exploited?

There is no known exploitation of CVE-2019-5476 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-5476 and fix it if it is affected.

What it is: CVE-2019-5476 is a critical SQL injection vulnerability in lookup.nextcloud.com, published on 7 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-5476 in the wild and no public exploit code.

Affected product: lookup.nextcloud.com. 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-2019-5476/ (Markdown: https://insights.sbomify.com/CVE-2019-5476/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-5476
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-5476
- OSV: https://osv.dev/vulnerability/CVE-2019-5476

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-5476/
Summaries are generated and may contain mistakes; the official description above is the record.