#VU51421 DOM-based cross-site scripting in BIG-IP Advanced WAF and BIG-IP ASM - CVE-2021-22993
Published: March 11, 2021
Vulnerability identifier: #VU51421
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green
CVE-ID: CVE-2021-22993
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
BIG-IP Advanced WAF
BIG-IP ASM
BIG-IP Advanced WAF
BIG-IP ASM
Software vendor:
F5 Networks
F5 Networks
Description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the BIG-IP ASM DoS Profile properties page. A remote attacker can inject a malicious script into the BIG-IP Advanced WAF and ASM Configuration utility and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Remediation
Install updates from vendor's website.