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TI-2024-30158 Aliases CVE-2024-45046GHSA-wgmf-q9vr-vww6

PhpSpreadsheet HTML writer is vulnerable to Cross-Site Scripting via style information

Priority MEDIUM 58CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

PHPSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In affected versions `\PhpOffice\PhpSpreadsheet\Writer\Html` doesn't sanitize spreadsheet styling information such as font names, allowing an attacker to inject arbitrary JavaScript on the page. As a result an attacker may used a crafted spreadsheet to fully takeover a session of a user viewing spreadsheet files as HTML. This issue has been addressed in release version 2.1.0. All users are advised to upgrade. There are no known workarounds for this vulnerability.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00418 36th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed PhpSpreadsheet (PHPOffice): 2.1.0phpoffice/phpspreadsheet (Packagist): 2.1.0, 1.29.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PHPOfficePhpSpreadsheetbefore 2.1.02.1.0Patch availableCNA
—phpoffice/phpspreadsheet (Packagist)2.0.0 to before 2.1.02.1.0Patch availableGHSA-wgmf-q9vr-vww6
—phpoffice/phpspreadsheet (Packagist)before 1.29.11.29.1Patch availableGHSA-wgmf-q9vr-vww6
—phpoffice/phpexcel (Packagist)up to 1.8.2—No fix listedGHSA-wgmf-q9vr-vww6
  • PhpSpreadsheet VendorPHPOffice Affected before 2.1.0 Fixed in 2.1.0 Patch available CNA
  • phpoffice/phpspreadsheet (Packagist) Vendor— Affected 2.0.0 to before 2.1.0 Fixed in 2.1.0 Patch available GHSA-wgmf-q9vr-vww6
  • phpoffice/phpspreadsheet (Packagist) Vendor— Affected before 1.29.1 Fixed in 1.29.1 Patch available GHSA-wgmf-q9vr-vww6
  • phpoffice/phpexcel (Packagist) Vendor— Affected up to 1.8.2 Fixed in — No fix listed GHSA-wgmf-q9vr-vww6

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*before 1.29.1; 2.0.0 to before 2.1.0VulnerablePHPOffice
  • cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:* Versions before 1.29.1; 2.0.0 to before 2.1.0 Vulnerable ·PHPOffice

Remediation

  • Fix · CNA PhpSpreadsheet (PHPOffice) Fixed in 2.1.0
  • Fix · GHSA-wgmf-q9vr-vww6 phpoffice/phpspreadsheet (Packagist) Fixed in 2.1.0 Advisory →
  • Fix · GHSA-wgmf-q9vr-vww6 phpoffice/phpspreadsheet (Packagist) Fixed in 1.29.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-45046
  2. 2026-10-03 Alias added: GHSA-wgmf-q9vr-vww6

References

Exploit 1

Patch 2

Advisory 1

Other 1

  • TI-2026-26406 PhpSpreadsheet SSRF and RCE via PHP stream wrappers in IOFactory::load CVSS 4.0CRITICAL 9.2
  • TI-2024-37339 PhpSpreadsheet vulnerable to unauthorized reflected XSS in Currency.php file CVSS 4.0HIGH 8.3
  • TI-2024-37338 PhpSpreadsheet allows unauthorized reflected XSS in `Convert-Online.php` file CVSS 4.0HIGH 8.3
  • TI-2024-37325 PhpSpreadsheet vulnerable to unauthorized reflected XSS in the Accounting.php file CVSS 4.0HIGH 8.3
  • TI-2024-37324 PhpSpreadsheet vulnerable to unauthorized reflected XSS in the constructor of the Downloader class CVSS 4.0HIGH 8.3
  • TI-2024-30160 XML External Entity Reference (XXE) in PHPSpreadsheet CVSS 3.1HIGH 8.8
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences