# CVE-2023-31434: Cross-site scripting in n/a

> Authenticated attackers can inject HTML and XSS payloads via user profile and direct link parameters in evasys, potentially leading to code execution or account takeover.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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:** 2 May 2023
- **Updated:** 30 Jan 2025
- **Also known as:** GHSA-5fv5-gvx6-w9hh

## What is CVE-2023-31434?

CVE-2023-31434 is a medium-severity cross-site scripting vulnerability in n/a, published on 2 May 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The parameters nutzer_titel, nutzer_vn, and nutzer_nn in the user profile, and langID and ONLINEID in direct links, in evasys before 8.2 Build 2286 and 9.x before 9.0 Build 2401 do not validate input, which allows authenticated attackers to inject HTML Code and XSS payloads in multiple locations.

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

## Which versions are affected by CVE-2023-31434?

It affects 1 product.


Products: Evasys Evasys.

## How do I fix CVE-2023-31434?

No fix has been published for CVE-2023-31434 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-31434 being exploited?

There is no known exploitation of CVE-2023-31434 in the wild and no public exploit code.

Public exploit code:

- https://github.com/trustcves/CVE-2023-31434 (github_poc): https://github.com/trustcves/CVE-2023-31434

## Other vulnerabilities in n/a

- [CVE-2023-31433](https://insights.sbomify.com/CVE-2023-31433/): SQL injection in n/a (high 8.8)
- [CVE-2023-31435](https://insights.sbomify.com/CVE-2023-31435/): Missing authorization in n/a (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-31434 and fix it if it is affected.

What it is: CVE-2023-31434 is a medium-severity cross-site scripting vulnerability in n/a, published on 2 May 2023. 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-2023-31434 in the wild and no public exploit code.

Affected product: n/a. 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-2023-31434/ (Markdown: https://insights.sbomify.com/CVE-2023-31434/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-31434
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-31434
- OSV: https://osv.dev/vulnerability/CVE-2023-31434

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-31434/
Summaries are generated and may contain mistakes; the official description above is the record.