CVE-2024-56410: Phpoffice Phpspreadsheet

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

PhpSpreadsheet is a PHP library for reading and writing spreadsheet files. Versions prior to 3.7.0, 2.3.5, 2.1.6, and 1.29.7 have a cross-site scripting (XSS) vulnerability in custom properties. The HTML page is generated without clearing custom properties. Versions 3.7.0, 2.3.5, 2.1.6, and 1.29.7 contain a patch for the issue.

Affected products

• Phpoffice Phpspreadsheet: before 1.29.7 (fixed in 1.29.7); from 2.0.0, before 2.1.6 (fixed in 2.1.6); from 2.2.0, before 2.3.5 (fixed in 2.3.5); from 3.3.0, before 3.7.0 (fixed in 3.7.0)

Published 2025-01-03. Last modified 2026-06-17.