Cross-site scripting in jQuery

Published: 2020-04-21 | Updated: 2022-07-14

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-11022 CVE-2020-11023
CWE-ID	CWE-79
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available. Vulnerability #2 is being exploited in the wild.
Vulnerable software	jQuery Web applications / JS libraries
Vendor	The jQuery Team

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

Updated: 05.05.2020

1) Added vulnerability #2, assigned CVE-ID to vulnerability #1, updated description, list of affected versions and references sections.

2) Assigned CVE-ID to vulnerability #2.

1) Cross-site scripting

EUVDB-ID: #VU27052

Risk: Low

CVSSv4.0: 2 [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:P/U:Clear]

CVE-ID: CVE-2020-11022

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: Yes

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 regex operation in "jQuery.htmlPrefilter". A remote attacker can pass specially crafted data to the application that uses .html()</code>, <code>.append() or similar methods for it and execute arbitrary JavaScript 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

jQuery: 1.2 - 3.4.1

CPE2.3

External links

https://snyk.io/vuln/SNYK-JS-JQUERY-565129
https://github.com/jquery/jquery/commit/1d61fd9407e6fbe82fe55cb0b938307aa0791f77
https://blog.jquery.com/2020/04/10/jquery-3-5-0-released/
https://github.com/advisories/GHSA-gxr4-xjj5-5px2

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Cross-site scripting

EUVDB-ID: #VU27519