Description
PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. `\PhpOffice\PhpSpreadsheet\Writer\Html` does not sanitize "javascript:" URLs from hyperlink `href` attributes, resulting in a Cross-Site Scripting vulnerability. 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
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
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