CVE-2021-4132 Cross-site Scripting (XSS) - Stored in livehelperchat/livehelperchat

What is CVE-2021-4132?

CVE-2021-4132 is a high-severity cross-site scripting vulnerability in livehelperchat/livehelperchat, published on 17 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

livehelperchat is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Weakness: CWE-79

Which versions are affected by CVE-2021-4132?

3 open source packages ship an affected version, including remdex/livehelperchat and livehelperchat. It affects 1 product.

Products include Livehelperchat Live Helper Chat.

How do I fix CVE-2021-4132?

Upgrade remdex/livehelperchat to 3.91 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-4132 being exploited?

There is no known exploitation of CVE-2021-4132 in the wild and no public exploit code.

Other vulnerabilities in livehelperchat/livehelperchat

• CVE-2024-27516 livehelperchat Server-Side Template Injection Critical 9.8
• CVE-2022-0935 Host Header injection in password Reset in livehelperchat/livehelperchat High 8.8
• CVE-2022-1234 XSS in livehelperchat in livehelperchat/livehelperchat High 8.8
• CVE-2022-1191 SSRF on index.php/cobrowse/proxycss/ in livehelperchat/livehelperchat High 8.7
• CVE-2022-1213 SSRF filter bypass port 80, 433 in livehelperchat/livehelperchat High 7.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-livehelperchat-2021-4132, GHSA-f7xw-46vh-5jw2.