CVE-2025-20148: secure firewall Input Validation Flaw

Description

A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) 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, read arbitrary files from the underlying operating system, and conduct server-side request forgery (SSRF) attacks. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Security Analyst (Read Only).

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CVSS v3.1 Score

8.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Weakness Type (CWE)

CWE-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All
cisco	secure_firewall_management_center	All

References

Advisories & Patches

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-html-inj-MqjrZrny

Frequently Asked Questions

What is CVE-2025-20148? +

A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) 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, read arbitrary files from the underlying operating system, and conduct server-side request forgery (SSRF) attacks. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Security Analyst (Read Only). It has a CVSS v3.1 base score of 8.5 (HIGH).

How severe is CVE-2025-20148? +

CVE-2025-20148 has a CVSS v3.1 score of 8.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-20148? +

CVE-2025-20148 affects products from cisco, specifically: secure_firewall_management_center. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20148? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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