What’s Vulnerable › Vulnerabilities

CVE-2021-4176: Cross-site Scripting (XSS) - Reflected in livehelperchat/livehelperchat

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-29 · updated 2026-06-17
• Weakness: CWE-79

Description

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

Affected products

• livehelperchat/livehelperchat: before 3.91 — fixed in 3.91

How to fix

Upgrade to a fixed version: livehelperchat/livehelperchat 3.91. Check the vendor advisory for mitigations.

References

• https://github.com/livehelperchat/livehelperchat/commit/1f67cf9f251289a5094774307c2c3d638f9f0ba6
• https://huntr.dev/bounties/8b531ae9-2d36-43ff-af33-4d81acfb2f27
• https://github.com/livehelperchat/livehelperchat/commit/1f67cf9f251289a5094774307c2c3d638f9f0ba6
• https://huntr.dev/bounties/8b531ae9-2d36-43ff-af33-4d81acfb2f27

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