What is CVE-2024-56411?

CVE-2024-56411 is a medium-severity vulnerability in Phpoffice Phpspreadsheet, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-01-03.

How severe is CVE-2024-56411?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Phpoffice Phpspreadsheet

CVE-2024-56411

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-01-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (27.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Phpoffice Phpspreadsheet — versions >= 3.0.0, < 3.7.0, < 1.29.7, >= 2.0.0, < 2.1.6

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-hwcp-2h35-p66w (Exploit, Vendor Advisory)
github.com/PHPOffice/PhpSpreadsheet/commit/45052f88e04c735d56457a8ffcdc40b2635a… (Patch)

Frequently asked questions

What is CVE-2024-56411?: CVE-2024-56411 is a medium-severity vulnerability in Phpoffice Phpspreadsheet, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-01-03.
How severe is CVE-2024-56411?: Medium severity. CVSS v3 base score is 5.4 out of 10.