DOM-based cross-site scripting in BIG-IP ASM and BIG-IP Advanced WAF - CVE-2021-22993
Published: March 11, 2021
Vulnerability identifier: #VU51421
CSH Severity: Medium
CVSS v4: 5.1 [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]
CVE-ID: CVE-2021-22993
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
BIG-IP ASM
BIG-IP Advanced WAF
BIG-IP Advanced WAF
How to mitigate CVE-2021-22993
Install updates from vendor's website.
BIG-IP ASM - addressed in versions 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP Advanced WAF - addressed in versions 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP Advanced WAF - addressed in versions 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1