What’s Vulnerable › Vulnerabilities

CVE-2024-56411: PhpSpreadsheet has Cross-Site Scripting (XSS) vulnerability of the hyperlink base in the HTML page header

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-01-03 · updated 2026-06-17
• Weakness: CWE-79

Description

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 of the hyperlink base in the HTML page header. The HTML page is formed without sanitizing the hyperlink base. 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; from 2.0.0 before 2.1.6; from 2.2.0 before 2.3.5; from 3.0.0 before 3.7.0 — fixed in 1.29.7, 2.1.6, 2.3.5, 3.7.0

How to fix

Upgrade to a fixed version: PHPOffice PhpSpreadsheet 1.29.7, 2.1.6, 2.3.5, 3.7.0. Check the vendor advisory for mitigations.

References

• https://github.com/PHPOffice/PhpSpreadsheet/commit/45052f88e04c735d56457a8ffcdc40b2635a028e
• https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-hwcp-2h35-p66w

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