# CVE-2020-3233: Cisco IOx Application Framework Local Manager Stored Cross-Site Scripting Vulnerability

> Authenticated attackers can inject malicious scripts into the Cisco IOx Local Manager interface, allowing arbitrary code execution or data theft in victim browsers.

- **Severity:** Medium 6.4 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 3 Jun 2020
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-g8jq-xwcj-j8m3

## What is CVE-2020-3233?

CVE-2020-3233 is a medium-severity cross-site scripting vulnerability in Cisco IOx, published on 3 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in the web-based Local Manager interface of the Cisco IOx Application Framework could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the web-based Local Manager interface of an affected device. The attacker must have valid Local Manager credentials. The vulnerability is due to insufficient validation of user-supplied input by the web-based Local Manager interface of the affected software. An attacker could exploit this vulnerability by injecting malicious code into a system settings tab. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected web interface or allow the attacker to access sensitive browser-based information.

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

## Which versions are affected by CVE-2020-3233?

It affects 1 product.


Products: Cisco Iox.

## How do I fix CVE-2020-3233?

No fix has been published for CVE-2020-3233 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3233 being exploited?

There is no known exploitation of CVE-2020-3233 in the wild and no public exploit code.

## Other vulnerabilities in Cisco IOx

- [CVE-2017-3853](https://insights.sbomify.com/CVE-2017-3853/): Memory corruption in Cisco IOx (critical 9.8)
- [CVE-2020-3238](https://insights.sbomify.com/CVE-2020-3238/): Cisco IOx Application Framework Arbitrary File Creation Vulnerability (high 8.1)
- [CVE-2017-3852](https://insights.sbomify.com/CVE-2017-3852/): Path traversal in Cisco Application-Hosting Framework (high 8.1)
- [CVE-2017-3851](https://insights.sbomify.com/CVE-2017-3851/): Path traversal in Cisco Application-Hosting Framework (high 7.5)
- [CVE-2016-9199](https://insights.sbomify.com/CVE-2016-9199/): Path traversal in Cisco IOx (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3233 and fix it if it is affected.

What it is: CVE-2020-3233 is a medium-severity cross-site scripting vulnerability in Cisco IOx, published on 3 Jun 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-3233 in the wild and no public exploit code.

Affected product: Cisco IOx. 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-2020-3233/ (Markdown: https://insights.sbomify.com/CVE-2020-3233/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3233
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3233
- OSV: https://osv.dev/vulnerability/CVE-2020-3233

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-3233/
Summaries are generated and may contain mistakes; the official description above is the record.