# CVE-2024-20400: Open redirect in Cisco TelePresence Video Communication Server (VCS) Expressway

> An unauthenticated remote attacker can redirect users to malicious web pages via improper input validation in the Cisco Expressway web interface.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N`)
- **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:** 17 Jul 2024
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-cv3h-4jh6-rh6p

## What is CVE-2024-20400?

CVE-2024-20400 is a medium-severity vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway, published on 17 Jul 2024. 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

A vulnerability in the web-based management interface of Cisco Expressway Series could allow an unauthenticated, remote attacker to redirect a user to a malicious web page.

 This vulnerability is due to improper input validation of HTTP request parameters. An attacker could exploit this vulnerability by intercepting and modifying an HTTP request from a user. A successful exploit could allow the attacker to redirect the user to a malicious web page.

 Note: Cisco Expressway Series refers to Cisco Expressway Control (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2024-20400?

It affects 1 product.


Products: Cisco Telepresence Video Communication Server.

## How do I fix CVE-2024-20400?

No fix has been published for CVE-2024-20400 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-20400 being exploited?

There is no known exploitation of CVE-2024-20400 in the wild and no public exploit code.

## Other vulnerabilities in Cisco TelePresence Video Communication Server (VCS) Expressway

- [CVE-2023-20105](https://insights.sbomify.com/CVE-2023-20105/): Privilege escalation in Cisco TelePresence Video Communication Server (VCS) Expressway (critical 9.6)
- [CVE-2023-20192](https://insights.sbomify.com/CVE-2023-20192/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Privilege Escalation Vulnerabilities (critical 9.6)
- [CVE-2022-20754](https://insights.sbomify.com/CVE-2022-20754/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities (critical 9.0)
- [CVE-2022-20755](https://insights.sbomify.com/CVE-2022-20755/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities (critical 9.0)
- [CVE-2016-1468](https://insights.sbomify.com/CVE-2016-1468/): Command injection in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-20400 and fix it if it is affected.

What it is: CVE-2024-20400 is a medium-severity vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway, published on 17 Jul 2024. 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-2024-20400 in the wild and no public exploit code.

Affected product: Cisco TelePresence Video Communication Server (VCS) Expressway. 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-2024-20400/ (Markdown: https://insights.sbomify.com/CVE-2024-20400/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-20400
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-20400
- OSV: https://osv.dev/vulnerability/CVE-2024-20400

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-20400/
Summaries are generated and may contain mistakes; the official description above is the record.