# CVE-2018-15702: Cross-site request forgery in TP-Link TL-WRN841N

> Attackers can perform unauthorized actions on TP-Link routers via CSRF due to insufficient referer validation in the web interface.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 1 Oct 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-qqx8-3689-m9w5

## What is CVE-2018-15702?

CVE-2018-15702 is a high-severity vulnerability in TP-Link TL-WRN841N, published on 1 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 web interface in TP-Link TL-WRN841N 0.9.1 4.16 v0348.0 is vulnerable to CSRF due to insufficient validation of the referer field.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2018-15702?

It affects 1 product.


Products: Tp-Link Tl-Wrn841n Firmware.

## How do I fix CVE-2018-15702?

No fix has been published for CVE-2018-15702 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-15702 being exploited?

There is no known exploitation of CVE-2018-15702 in the wild and no public exploit code.

## Other vulnerabilities in TP-Link TL-WRN841N

- [CVE-2018-15700](https://insights.sbomify.com/CVE-2018-15700/): Denial of service in TP-Link TL-WRN841N (medium 6.5)
- [CVE-2018-15701](https://insights.sbomify.com/CVE-2018-15701/): Denial of service in TP-Link TL-WRN841N (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-15702 and fix it if it is affected.

What it is: CVE-2018-15702 is a high-severity vulnerability in TP-Link TL-WRN841N, published on 1 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-2018-15702 in the wild and no public exploit code.

Affected product: TP-Link TL-WRN841N. 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-2018-15702/ (Markdown: https://insights.sbomify.com/CVE-2018-15702/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-15702
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-15702
- OSV: https://osv.dev/vulnerability/CVE-2018-15702

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-15702/
Summaries are generated and may contain mistakes; the official description above is the record.