# CVE-2018-9034: Cross-site scripting in n/a

> Remote attackers can inject arbitrary JavaScript or HTML via the tab parameter in the Relevanssi WordPress plugin.

- **Severity:** Medium 5.4 (`CVSS:3.0/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:** 4 Apr 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-xmfw-pc9f-89cm

## What is CVE-2018-9034?

CVE-2018-9034 is a medium-severity cross-site scripting vulnerability in n/a, published on 4 Apr 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Cross-site scripting (XSS) vulnerability in lib/interface.php of the Relevanssi plugin 4.0.4 for WordPress allows remote attackers to inject arbitrary JavaScript or HTML via the tab GET parameter.

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

## Which versions are affected by CVE-2018-9034?

It affects 1 product.


Products: Relevanssi Relevanssi.

## How do I fix CVE-2018-9034?

No fix has been published for CVE-2018-9034 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-9034 being exploited?

There is no known exploitation of CVE-2018-9034 in the wild and no public exploit code.

Public exploit code:

- WordPress Plugin Relevanssi 4.0.4 - Reflected Cross-Site Scripting (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2016-10949](https://insights.sbomify.com/CVE-2016-10949/): SQL injection in n/a (high 8.8)
- [CVE-2017-1000225](https://insights.sbomify.com/CVE-2017-1000225/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2017-1000038](https://insights.sbomify.com/CVE-2017-1000038/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2024-3214](https://insights.sbomify.com/CVE-2024-3214/): Relevanssi – A Better Search <= 4.22.1 - Unauthenticated Second Order CSV Injection (medium 5.8)
- [CVE-2024-9021](https://insights.sbomify.com/CVE-2024-9021/): Relevanssi < 4.23.1 - Contributor+ Stored XSS (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-9034 and fix it if it is affected.

What it is: CVE-2018-9034 is a medium-severity cross-site scripting vulnerability in n/a, published on 4 Apr 2018. 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-2018-9034 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-2018-9034/ (Markdown: https://insights.sbomify.com/CVE-2018-9034/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-9034
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-9034
- OSV: https://osv.dev/vulnerability/CVE-2018-9034

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-9034/
Summaries are generated and may contain mistakes; the official description above is the record.