# CVE-2018-18198: Cross-site scripting in n/a

> An attacker can inject malicious scripts via the opener_input_field parameter in REDAXO, potentially leading to session hijacking or code execution.

- **Severity:** Medium 6.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 9 Oct 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-993q-f479-5m8q

## What is CVE-2018-18198?

CVE-2018-18198 is a medium-severity cross-site scripting vulnerability in n/a, published on 9 Oct 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The $opener_input_field variable in addons/mediapool/pages/index.php in REDAXO 5.6.3 is not effectively filtered and is output directly to the page. The attacker can insert XSS payloads via an index.php?page=mediapool/media&opener_input_field=[XSS] request.

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

## Which versions are affected by CVE-2018-18198?

It affects 1 product.


Products: Redaxo Redaxo.

## How do I fix CVE-2018-18198?

No fix has been published for CVE-2018-18198 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-18198 being exploited?

There is no known exploitation of CVE-2018-18198 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-18200](https://insights.sbomify.com/CVE-2018-18200/): SQL injection in n/a (critical 9.8)
- [CVE-2018-17831](https://insights.sbomify.com/CVE-2018-17831/): SQL injection in n/a (critical 9.8)
- [CVE-2026-21857](https://insights.sbomify.com/CVE-2026-21857/): Redaxo has Path Traversal in Backup Addon Leading to Arbitrary File Read (high 8.3)
- [CVE-2006-2843](https://insights.sbomify.com/CVE-2006-2843/): Code injection in n/a (high 7.5)
- [CVE-2006-2844](https://insights.sbomify.com/CVE-2006-2844/): Multiple PHP remote file inclusion vulnerabilities in Redaxo 3.0 allow remote attackers to execute arbitrary PHP code via a URL in the REX[I (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-18198 and fix it if it is affected.

What it is: CVE-2018-18198 is a medium-severity cross-site scripting vulnerability in n/a, published on 9 Oct 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-18198 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-2018-18198/ (Markdown: https://insights.sbomify.com/CVE-2018-18198/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-18198
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-18198
- OSV: https://osv.dev/vulnerability/CVE-2018-18198

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-18198/
Summaries are generated and may contain mistakes; the official description above is the record.