Description
PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. One of the sample scripts in PhpSpreadsheet is susceptible to a cross-site scripting (XSS) vulnerability due to improper handling of input where a number is expected leading to formula injection. The code in in `45_Quadratic_equation_solver.php` concatenates the user supplied parameters directly into spreadsheet formulas. This allows an attacker to take control over the formula and output unsanitized data into the page, resulting in JavaScript execution. This issue has been addressed in release versions 1.29.2, 2.1.1, and 2.3.0. All users are advised to upgrade. There are no known workarounds for this vulnerability.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None
Affected products
- PHPOffice / PhpSpreadsheet< 1.29.2 – < 1.29.2
- PHPOffice / PhpSpreadsheet>= 2.0.0, < 2.1.1 – >= 2.0.0, < 2.1.1
- PHPOffice / PhpSpreadsheet>= 2.2.0, < 2.3.0 – >= 2.2.0, < 2.3.0