# CVE-2021-45673: Cross-site scripting in n/a

> Stored XSS in NETGEAR routers allows attackers to inject malicious scripts, potentially leading to session hijacking or code execution.

- **Severity:** Medium 4.8 (`CVSS:3.1/AC:L/AV:A/A:N/C:L/I:L/PR:L/S:C/UI:R`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 26 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-8wfx-77v8-mc24

## What is CVE-2021-45673?

CVE-2021-45673 is a medium-severity cross-site scripting vulnerability in Netgear R6900p Firmware, published on 26 Dec 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Certain NETGEAR devices are affected by stored XSS. This affects R7000 before 1.0.11.110, R7900 before 1.0.4.30, R8000 before 1.0.4.62, RAX200 before 1.0.3.106, R7000P before 1.3.3.140, RAX80 before 1.0.3.106, R6900P before 1.3.3.140, and RAX75 before 1.0.3.106.

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

## Which versions are affected by CVE-2021-45673?

It affects 8 products.


Products: Netgear R6900p Firmware, Netgear R7000 Firmware, Netgear R7000p Firmware, Netgear R7900 Firmware, Netgear R8000 Firmware, Netgear Rax200 Firmware, Netgear Rax75 Firmware, Netgear Rax80 Firmware.

## How do I fix CVE-2021-45673?

No fix has been published for CVE-2021-45673 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45673 being exploited?

There is no known exploitation of CVE-2021-45673 in the wild and no public exploit code.

## Other vulnerabilities in Netgear R6900p Firmware

- [CVE-2021-45625](https://insights.sbomify.com/CVE-2021-45625/): Command injection in n/a (critical 9.6)
- [CVE-2023-38412](https://insights.sbomify.com/CVE-2023-38412/): Memory corruption in n/a (high 8.8)
- [CVE-2021-45553](https://insights.sbomify.com/CVE-2021-45553/): Command injection in n/a (high 8.7)
- [CVE-2021-45679](https://insights.sbomify.com/CVE-2021-45679/): Privilege escalation in n/a (high 8.4)
- [CVE-2021-45499](https://insights.sbomify.com/CVE-2021-45499/): Auth bypass in n/a (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45673 and fix it if it is affected.

What it is: CVE-2021-45673 is a medium-severity cross-site scripting vulnerability in Netgear R6900p Firmware, published on 26 Dec 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-45673 in the wild and no public exploit code.

Affected product: Netgear R6900p Firmware. 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-2021-45673/ (Markdown: https://insights.sbomify.com/CVE-2021-45673/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45673
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45673
- OSV: https://osv.dev/vulnerability/CVE-2021-45673

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45673/
Summaries are generated and may contain mistakes; the official description above is the record.