PhpSpreadsheet allows unauthorized Reflected XSS in the constructor of the Downloader class
Unauthorized Reflected XSS in the constructor of the Downloader class
Product: Phpspreadsheet
Version: version 3.6.0
CWE-ID: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS vector v.3.1: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)
CVSS vector v.4.0: 8.3 (AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L)
Description: using the /vendor/phpoffice/phpspreadsheet/samples/download.php script, an attacker can perform a XSS-type attack
Impact: execution of arbitrary JavaScript code in the browser
Vulnerable component: the constructor of the Downloader class
Exploitation conditions: an unauthorized user
Mitigation: sanitization of the name and type variables
Researcher: Aleksey Solovev (Positive Technologies)
Research
The researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in the constructor of the Downloader class) in Phpspreadsheet.
The latest version (3.6.0) of the phpoffice/phpspreadsheet library was installed. The installation was carried out with the inclusion of examples.
Listing 1. Installing the phpoffice/phpspreadsheet library
$ composer require phpoffice/phpspreadsheet --prefer-sourceThe ./vendor/phpoffice/phpspreadsheet/samples/download.php file processes the GET parameters name and type.
Figure 1. The ./vendor/phpoffice/phpspreadsheet/samples/download.php file accepts GET parameters.
Consider the constructor of the Downloader class, where GET parameters are passed. Error is displayed without sanitization using GET parameters transmitted from the user.
Figure 2. Error is displayed without sanitization
When clicking on the following link, arbitrary JavaScript code will be executed.
Listing 2.
https://192.***.***.***/vendor/phpoffice/phpspreadsheet/samples/download.php?name=%3Cimg%20src=1%20onerror=alert()%3E&type=1Demonstration of the execution of arbitrary JavaScript code.
<img width="537" alt="fig3" src="https://github.com/user-attachments/assets/745d6e21-396f-4357-8ff8-e856adf15fee" />Figure 3. Executing arbitrary JavaScript code
Credit
This vulnerability was discovered by Aleksey Solovev (Positive Technologies)
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de Composer | phpoffice/phpexcel | <= 1.8.2 | sin corrección |
| Paquete de Composer | phpoffice/phpspreadsheet | >= 3.0.0, < 3.7.0, < 1.29.7, >= 2.0.0, < 2.1.6, >= 2.2.0, < 2.3.5 | 3.7.0, 1.29.7, 2.1.6, 2.3.5 |
Referencias
- https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-jmpx-686v-c3wx
- https://nvd.nist.gov/vuln/detail/CVE-2024-56365
- https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4#diff-fbb0f53a5c68eeeffaa9ab35552c0b01740396f1a4045af5d2935ec2a62a7816
- https://github.com/PHPOffice/PhpSpreadsheet
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N- Debilidad (CWE)
CWE-79- Plataforma
- Composer
- Paquete
phpoffice/phpexcel, phpoffice/phpspreadsheet- Publicada
- 03.01.2025
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-jmpx-686v-c3wx - CC BY 4.0
Historial de vulnerabilidades: phpoffice/phpexcel
Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 23
- Primera → última
- 11.2019 02.2025
- Sin corrección
- 20
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 12
- Media 10
- Baja 1
Divulgaciones por año
- 2019: 2
- 2020: 0
- 2021: 1
- 2022: 1
- 2023: 0
- 2024: 10
- 2025: 9
- 2026: 0
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