# CVE-2020-29655: Cross-site scripting in n/a

> An attacker can inject text into the login page title via the productname parameter, potentially misleading users on ASUS RT-AC88U routers.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-c3hj-2397-cgqm

## What is CVE-2020-29655?

CVE-2020-29655 is a high-severity cross-site scripting vulnerability in n/a, published on 9 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An injection vulnerability exists in RT-AC88U Download Master before 3.1.0.108. Accessing Main_Login.asp?flag=1&productname=FOOBAR&url=/downloadmaster/task.asp will redirect to the login site, which will show the value of the parameter productname within the title. An attacker might be able to influence the appearance of the login page, aka text injection.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2020-29655?

It affects 1 product.


Products: Asus Rt-Ac88u Firmware.

## How do I fix CVE-2020-29655?

No fix has been published for CVE-2020-29655 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-29655 being exploited?

There is no known exploitation of CVE-2020-29655 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-29656](https://insights.sbomify.com/CVE-2020-29656/): Information disclosure in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-29655 and fix it if it is affected.

What it is: CVE-2020-29655 is a high-severity cross-site scripting vulnerability in n/a, published on 9 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-29655 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-2020-29655/ (Markdown: https://insights.sbomify.com/CVE-2020-29655/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-29655
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-29655
- OSV: https://osv.dev/vulnerability/CVE-2020-29655

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-29655/
Summaries are generated and may contain mistakes; the official description above is the record.