CVE-2022-1544: 
PHP vulnerability analysis and mitigation

Formula Injection/CSV Injection vulnerability (CVE-2022-1544) was discovered in GitHub repository luyadev/yii-helpers prior to version 1.2.1. The vulnerability is due to improper neutralization of formula elements in CSV files, which could allow attackers to inject malicious formulas (GitHub Commit).

The vulnerability exists in the CSV export functionality where special characters and formula elements were not properly sanitized before being written to CSV files. The issue specifically affects the ExportHelper class where values starting with specific characters (=, +, -, @, newlines, tabs) were not properly escaped, allowing for potential formula injections (GitHub Commit).

When exploited, this vulnerability could allow an attacker to inject malicious formulas into CSV files, which could be executed when opened in spreadsheet applications. This could lead to data manipulation, information disclosure, or potential code execution in the context of the spreadsheet application (OWASP CSV Injection).

The issue was fixed in version 1.2.1 released on April 21, 2022. The fix implements proper sanitization of values by prefixing potentially dangerous formula elements with a single quote character. Users should upgrade to version 1.2.1 or later to receive the security fix (GitHub Commit).