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Vulnerability record · CVE-2025-20235 · published 14 August 2025

CVE-2025-20235: Cisco secure firewall management center cross-site scripting vulnerability

Cisco · Secure Firewall Management Center

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.

6.1 CVSS 3.1 Medium EPSS 0.29% · top 79.8% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score
0.29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xss-JtNmcusP Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-20131Cisco Secure Firewall Management Center Java deserialization RCECisco Secure Firewall Management Center (FMC) web management interface deserializes a user-supplied Java byte stream without validation, allowing una…KEVEPSS 43%analysed10.0CVE-2026-20079Cisco Secure Firewall Management Center authentication bypass to rootCisco Secure Firewall Management Center (FMC) Software contains an authentication bypass caused by an improper system process created at boot time. A…KEVEPSS 88%analysed5.3CVE-2026-20316Cisco Secure Firewall Management Center static credentials allow unauthenticated loginCisco Secure Firewall Management Center (FMC) Software contains hard-coded credentials for a low-privileged account in its web interface. An unauthen…KEVEPSS 35%analysed10.0CVE-2025-20265Cisco secure firewall management center injection vulnerabilityA vulnerability in the RADIUS subsystem implementation of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remo…EPSS 16%9.9CVE-2024-20424Cisco secure firewall management center os command injection vulnerabilityA vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software, formerly Firepower Management Center…EPSS 0.94%9.9CVE-2023-20048Cisco secure firewall management center improper privilege management vulnerabilityA vulnerability in the web services interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to ex…EPSS 16%9.8CVE-2019-16028Cisco secure firewall management center improper authentication vulnerabilityA vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) could allow an unauthenticated, remote attacker to b…EPSS 3.4%9.8CVE-2020-3318Cisco secure firewall management center hard-coded credentials vulnerabilityMultiple vulnerabilities in Cisco Firepower Management Center (FMC) Software and Cisco Firepower User Agent Software could allow an attacker to acces…EPSS 0.96%

Source: NIST National Vulnerability Database (record CVE-2025-20235), CISA KEV, FIRST EPSS (scores of 2026-10-11). This page is refreshed as NVD updates the record.