CVE-2024-56366

PhpSpreadsheet vulnerable to unauthorized reflected XSS in the Accounting.php file

MEDIUM

5.4

CVSS Score

Published: January 3, 2025 at 05:01 PM UTC

Updated: June 17, 2026 at 08:12 AM UTC

1 product affected across 1 vendorPhpSpreadsheet

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Severity

MEDIUM5.4

Exploit prediction

EPSS 0.3%

SSVC

PoC

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 are vulnerable to unauthorized reflected cross-site scripting in the `Accounting.php` file. Using the `/vendor/phpoffice/phpspreadsheet/samples/Wizards/NumberFormat/Accounting.php` script, an attacker can perform a cross-site scripting attack. Versions 3.7.0, 2.3.5, 2.1.6, and 1.29.7 contain a patch for the issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

PhpSpreadsheet · Phpofficecomposer

95%

v < 1.29.7v < 2.1.6v < 2.3.5v < 3.7.02.0.0 ≤ v < 2.1.62.2.0 ≤ v < 2.3.53.3.0 ≤ v < 3.7.0

Affected range stops below 1.29.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.1.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.3.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.7.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatch

Source: [email protected]

https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4

x_refsource_CONFIRMExploitVendor Advisory

Source: [email protected]

https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

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