CVE-2020-3320 Cisco Firepower Management Center Cross-Site Scripting Vulnerability
An authenticated attacker can inject malicious scripts into the Cisco Firepower Management Center interface, allowing code execution or data theft when viewed by other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-3320?
CVE-2020-3320 is a medium-severity cross-site scripting vulnerability in Cisco Secure Firewall Management Center, published on 8 Oct 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A vulnerability in the web-based management interface of Cisco Firepower Management Center could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based management interface of an affected device. The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected device. An attacker could exploit this vulnerability by first entering input within the web-based management interface and then persuading a user of the interface to view the crafted input within the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.
Weakness: CWE-79
Which versions are affected by CVE-2020-3320?
It affects 2 products.
Products include Cisco Secure Firewall Management Center, Cisco Sourcefire Defense Center.
How do I fix CVE-2020-3320?
No fix has been published for CVE-2020-3320 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2020-3320 being exploited?
There is no known exploitation of CVE-2020-3320 in the wild and no public exploit code.
Other vulnerabilities in Cisco Secure Firewall Management Center
- CVE-2026-20079 Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel
- CVE-2026-20131 Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data
- CVE-2026-20316 Cisco Secure Firewall Management Center Use of Hard-coded Password
- CVE-2025-20265 Cisco Secure Firewall Management Center Software Radius Remote Code Execution Vulnerability
- CVE-2024-20424 Command injection in Cisco Firepower Management Center
Sources
Also known as GHSA-2j2f-m353-7h94.