# CVE-2021-43702: Cross-site scripting in n/a

> An attacker can inject malicious scripts into WiFi logs via SSID, leading to stored XSS in the ASUS router admin panel.

- **Severity:** Critical 9.0 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H`)
- **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:** 5 Jul 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-vf6p-785f-8qgq

## What is CVE-2021-43702?

CVE-2021-43702 is a critical cross-site scripting vulnerability in n/a, published on 5 Jul 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

ASUS RT-A88U 3.0.0.4.386_45898 is vulnerable to Cross Site Scripting (XSS). The ASUS router admin panel does not sanitize the WiFI logs correctly, if an attacker was able to change the SSID of the router with a custom payload, they could achieve stored XSS on the device.

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

## Which versions are affected by CVE-2021-43702?

It affects 93 products.


Products: Asus 4g-Ac53u Firmware, Asus 4g-Ac68u Firmware, Asus Rog Rapture Gt-Ac2900 Firmware, Asus Rog Rapture Gt-Ac5300 Firmware, Asus Rog Rapture Gt-Ax11000 Firmware, Asus Rt-Ac1200 Firmware, Asus Rt-Ac1200e Firmware, Asus Rt-Ac1200g\+ Firmware, Asus Rt-Ac1200g Firmware, Asus Rt-Ac1200gu Firmware, Asus Rt-Ac1200hp Firmware, Asus Rt-Ac1300g\+ Firmware, Asus Rt-Ac1300uhp Firmware, Asus Rt-Ac1750 B1  Firmware, Asus Rt-Ac1750 Firmware, Asus Rt-Ac1900 Firmware, Asus Rt-Ac1900p Firmware, Asus Rt-Ac1900u Firmware, Asus Rt-Ac2200 Firmware, Asus Rt-Ac2400 Firmware and 73 more.

## How do I fix CVE-2021-43702?

No fix has been published for CVE-2021-43702 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-43702 being exploited?

There is no known exploitation of CVE-2021-43702 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-43702 and fix it if it is affected.

What it is: CVE-2021-43702 is a critical cross-site scripting vulnerability in n/a, published on 5 Jul 2022. 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-2021-43702 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-2021-43702/ (Markdown: https://insights.sbomify.com/CVE-2021-43702/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-43702
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-43702
- OSV: https://osv.dev/vulnerability/CVE-2021-43702

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-43702/
Summaries are generated and may contain mistakes; the official description above is the record.