# CVE-2023-5421: Possible XSS execution in customer information

> Authenticated users can execute JavaScript via CustomerID field if autocomplete is enabled, potentially leading to session hijacking or data theft.

- **Severity:** Low 3.5 (`CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Oct 2023
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-hqj4-p6qw-7mf2, UBUNTU-CVE-2023-5421

## What is CVE-2023-5421?

CVE-2023-5421 is a low-severity cross-site scripting vulnerability in Otrs Otrs, published on 16 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An attacker who is logged into OTRS as an user with privileges to create and change customer user data may manipulate the CustomerID field to execute JavaScript code that runs 
immediatly after the data is saved.The issue onlyoccurs if the configuration for AdminCustomerUser::UseAutoComplete was changed before.
This issue affects OTRS: from 7.0.X before 7.0.47, from 8.0.X before 8.0.37; ((OTRS)) Community Edition: from 6.0.X through 6.0.34.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2023-5421?

It affects 1 product.


Products: Otrs Otrs.

## How do I fix CVE-2023-5421?

No fix has been published for CVE-2023-5421 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-5421 being exploited?

There is no known exploitation of CVE-2023-5421 in the wild and no public exploit code.

## Other vulnerabilities in Otrs Otrs

- [CVE-2026-48188](https://insights.sbomify.com/CVE-2026-48188/): SQL Injection via MySQL Quote Method (critical 9.1)
- [CVE-2013-4717](https://insights.sbomify.com/CVE-2013-4717/): SQL injection in n/a (high 8.8)
- [CVE-2017-14635](https://insights.sbomify.com/CVE-2017-14635/): Code injection in n/a (high 8.8)
- [CVE-2023-5422](https://insights.sbomify.com/CVE-2023-5422/): SSL Certificates are not checked for E-Mail Handling (high 8.7)
- [CVE-2023-6254](https://insights.sbomify.com/CVE-2023-6254/): Password is send back to client (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-5421 and fix it if it is affected.

What it is: CVE-2023-5421 is a low-severity cross-site scripting vulnerability in Otrs Otrs, published on 16 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-5421 in the wild and no public exploit code.

Affected product: Otrs Otrs. 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-2023-5421/ (Markdown: https://insights.sbomify.com/CVE-2023-5421/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-5421
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-5421
- OSV: https://osv.dev/vulnerability/CVE-2023-5421

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-5421/
Summaries are generated and may contain mistakes; the official description above is the record.