CVE-2025-20235

MEDIUM

Published Aug 14, 2025 Modified Aug 25, 2025 CWE-79

Description

A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface. An attacker could exploit this vulnerability by inserting crafted input into various data fields in an affected interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or access sensitive, browser-based information.

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CVSS v3.1 Score

6.1

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

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
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
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
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
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-xss-JtNmcusP

Frequently Asked Questions

What is CVE-2025-20235? +

How severe is CVE-2025-20235? +

CVE-2025-20235 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-20235? +

CVE-2025-20235 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-2025-20235? +

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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