CVE-2021-4050 Cross-site Scripting (XSS) - Stored in livehelperchat/livehelperchat

What is CVE-2021-4050?

CVE-2021-4050 is a medium-severity cross-site scripting vulnerability in livehelperchat/livehelperchat, published on 8 Dec 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

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-2021-4050?

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-2021-4050?

No fix has been published for CVE-2021-4050 yet. Limit exposure of the affected software until one is available.

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-2021-4050 being exploited?

There is no known exploitation of CVE-2021-4050 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-2021-4050, GHSA-97cc-825c-399g.