CVE-2020-3320

Name: CVE-2020-3320
Creator: NVD / NIST
Published: 2020-10-08T05:15:14.367+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2020-3320 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.63%

45.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Secure Firewall Management Center	<= 6.6.1
Cisco	Sourcefire Defense Center	6.4.0
Cisco	Sourcefire Defense Center	6.4.0.6
Cisco	Sourcefire Defense Center	6.5.0
Cisco	Sourcefire Defense Center	6.6.0

References

Timeline

Published: Oct 8, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-3320?

How severe is CVE-2020-3320?

CVE-2020-3320 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3320?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-3320?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST