CVE-2021-4132: livehelperchat is vulnerable to Cross-site Scripting
5.4
CVSS Score
3.1
Basic Information
CVE ID
GHSA ID
EPSS Score
0.40806%
CWE
Published
1/5/2022
Updated
2/3/2023
KEV Status
No
Technology
PHP
Technical Details
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
---|---|---|---|
remdex/livehelperchat | composer | < 3.91 | 3.91 |
Vulnerability Intelligence
Miggo AI
Root Cause Analysis
The vulnerability stems from two key issues: 1) Missing HTML escaping in the Email field's value attribute in edit.tpl.php (CWE-79), allowing classic XSS. 2) Absence of ng-non-bindable attributes in multiple input fields across templates, enabling AngularJS context-based XSS. The patch added ng-non-bindable to prevent Angular interpretation and enforced input length limits, but the unescaped Email field remained a separate XSS vector. The combination of missing context-aware escaping and Angular binding controls created exploitable XSS scenarios in user account fields.