What is CVE-2021-1238?

CVE-2021-1238 is a vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) that allows an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack.

How severe is CVE-2021-1238?

CVE-2021-1238 has a severity score of 4.8, which is considered medium.

What software is affected by CVE-2021-1238?

Cisco Firepower Management Center versions up to and excluding 6.7.0 are affected by CVE-2021-1238.

How can an attacker exploit CVE-2021-1238?

An authenticated, remote attacker can exploit CVE-2021-1238 by conducting a stored cross-site scripting (XSS) attack against a user of the web-based management interface of an affected system.

Where can I find more information about CVE-2021-1238?

You can find more information about CVE-2021-1238 in the Cisco Security Advisory at https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-stored-xss-djKfCzf2

Vulnerability/
CVE-2021-1238

medium

4.8

CWE

13/1/2021

20/1/2021

CVE-2021-1238: XSS

First published: Wed Jan 13 2021(Updated: )

Multiple vulnerabilities in the web-based management interface of Cisco Firepower Management Center (FMC) could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface of an affected system. The vulnerabilities exist because the web-based management interface does not properly validate user-supplied input. An attacker could exploit these vulnerabilities by persuading a user of the interface to click a crafted link. 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.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco Firepower Management Center	<6.7.0

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Reference Links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-stored-xss-djKfCzf2

Frequently Asked Questions

What is CVE-2021-1238?
CVE-2021-1238 is a vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) that allows an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack.
How severe is CVE-2021-1238?
CVE-2021-1238 has a severity score of 4.8, which is considered medium.
What software is affected by CVE-2021-1238?
Cisco Firepower Management Center versions up to and excluding 6.7.0 are affected by CVE-2021-1238.
How can an attacker exploit CVE-2021-1238?
An authenticated, remote attacker can exploit CVE-2021-1238 by conducting a stored cross-site scripting (XSS) attack against a user of the web-based management interface of an affected system.
Where can I find more information about CVE-2021-1238?
You can find more information about CVE-2021-1238 in the Cisco Security Advisory at https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-stored-xss-djKfCzf2

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