CVE intelligence and bounded remediation

CVE-2024-20274 — Cisco Secure Firewall Management Center security vulnerability

Medium CVSS 5.5

A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software, formerly Firepower Management Center Software, could allow an authenticated, remote attacker to inject arbitrary HTML content into a device-generated document. This vulnerability is due to improper validation of user-supplied data. An attacker could exploit this vulnerability by submitting malicious content to an affected device and using the device to generate a document that contains sensitive information. A successful exploit could allow the attacker to alter the standard layout of the device-generated documents, access arbitrary files from the underlying operating system, and conduct server-side request forgery (SSRF) attacks. To successfully exploit this vulnerability, an attacker would need valid credentials for a user account with policy-editing permissions, such as Network Admin, Intrusion Admin, or any custom user role with the same capabilities.

Severity
Medium
CVSS
5.5 (3.1)
Published
2024-10-23
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-20, CWE-79

Affected products

  • cisco / secure_firewall_management_center / 6.2.3
  • cisco / secure_firewall_management_center / 6.2.3.1
  • cisco / secure_firewall_management_center / 6.2.3.2
  • cisco / secure_firewall_management_center / 6.2.3.3
  • cisco / secure_firewall_management_center / 6.2.3.4
  • cisco / secure_firewall_management_center / 6.2.3.5

Showing 6 representative product identities from 86 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Cross-site scripting and unsafe browser output

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Check exposure

  • Trace reflected, stored, and DOM-derived untrusted values into HTML, attributes, URLs, styles, scripts, and client-side template sinks.
  • Identify affected origins, authenticated user roles, sensitive browser capabilities, and where content is shared across tenants.
  • Review framework escaping, rich-text sanitization, legacy templates, and client-side rendering paths.

Remediate safely

  • Use context-aware framework output encoding and safe DOM APIs; keep untrusted data out of executable contexts.
  • Sanitize intentionally supported markup with a maintained allowlist policy and validate URLs and attributes separately.
  • Update affected rendering components and add tests for every output context using inert sentinel markup.

Authoritative sources

Complete CVE record and remediation plan

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