#VU25677 Stored cross-site scripting in Async JavaScript
Published: February 28, 2020
Vulnerability identifier: #VU25677
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:A/U:Green
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Async JavaScript
Async JavaScript
Software vendor:
Frank Goossens (futtta)
Frank Goossens (futtta)
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 "wp-admin/admin-ajax.php" file with the "aj_steps" AJAX action. A remote authenticated attacker can inject 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.
Note: the vulnerability is being actively exploited in the wild.
Remediation
Install updates from vendor's website.