{"id":53318,"date":"2025-06-18T08:30:57","date_gmt":"2025-06-18T08:30:57","guid":{"rendered":""},"modified":"2025-09-07T11:38:31","modified_gmt":"2025-09-07T17:38:31","slug":"cve-2025-47163-unauthorized-code-execution-through-microsoft-sharepoint-deserialization-vulnerability","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-47163-unauthorized-code-execution-through-microsoft-sharepoint-deserialization-vulnerability\/","title":{"rendered":"<strong>CVE-2025-47163: Unauthorized Code Execution Through Microsoft SharePoint Deserialization Vulnerability<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>Cybersecurity vulnerabilities come in various forms, and one of the most significant is deserialization of untrusted data. Microsoft Office SharePoint CVE-2025-47163 is a high-risk vulnerability that allows an authorized attacker to execute code over a network. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47166-critical-deserialization-vulnerability-in-microsoft-office-sharepoint\/\"  data-wpil-monitor-id=\"61090\">vulnerability primarily affects users of Microsoft<\/a> SharePoint, a web-based collaborative platform that integrates with Microsoft Office.<br \/>\nThe severity of this vulnerability is underscored by the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31222-potential-privilege-elevation-and-system-compromise-vulnerability\/\"  data-wpil-monitor-id=\"59657\">potential for system compromise<\/a> or data leakage. In a world increasingly reliant on digital communication and data storage, such a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31396-untrusted-data-deserialization-vulnerability-in-themeton-flap-business-wordpress-theme\/\"  data-wpil-monitor-id=\"60248\">vulnerability could have catastrophic impacts on businesses<\/a> and individuals alike. It is therefore crucial to understand and mitigate this vulnerability.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-47163<br \/>\nSeverity: High (8.8 CVSS Severity Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: Low (Authorized Access)<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5978-critical-vulnerability-in-tenda-fh1202-1-2-0-14-potentially-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"61091\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-123930838\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53770-critical-deserialization-vulnerability-in-microsoft-sharepoint-server\/\"  data-wpil-monitor-id=\"70521\">Microsoft SharePoint<\/a> | All unpatched versions<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49072-deserialization-of-untrusted-data-vulnerability-in-ancorathemes-mr-murphy\/\"  data-wpil-monitor-id=\"59705\">vulnerability exists due to improper deserialization of untrusted data<\/a> in Microsoft SharePoint. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47584-critical-deserialization-of-untrusted-data-vulnerability-in-themegoods-photography\/\"  data-wpil-monitor-id=\"59894\">Deserialization is the process of converting data<\/a> from a format suitable for storage or transmission back into an object. However, if an attacker can control the serialized data, they can manipulate it to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3835-remote-code-execution-vulnerability-in-zohocorp-manageengine-exchange-reporter-plus\/\"  data-wpil-monitor-id=\"59852\">execute arbitrary code<\/a> when the data is deserialized.<br \/>\nIn the case of CVE-2025-47163, an attacker with <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39536-authorization-vulnerability-in-chimpstudio-jobhunt-job-alerts\/\"  data-wpil-monitor-id=\"59889\">authorized access to the network could exploit this vulnerability<\/a> by sending a specially crafted serialized object to Microsoft SharePoint. When SharePoint deserializes the object, the attacker&#8217;s code would be executed, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21475-critical-memory-corruption-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"59930\">potentially leading to system<\/a> compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1544450912\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>Here is a highly simplified example of how an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5353-local-authenticated-attacker-exploit-in-ivanti-workspace-control\/\"  data-wpil-monitor-id=\"61092\">attacker might exploit<\/a> this vulnerability:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/_vti_bin\/client.svc HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\nAuthorization: Bearer malicious_serialized_object\n{ &quot;malicious_serialized_object&quot;: &quot;...&quot; }<\/code><\/pre>\n<p>In this example, the attacker sends a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5739-critical-buffer-overflow-vulnerability-in-totolink-x15-http-post-request-handler\/\"  data-wpil-monitor-id=\"59853\">POST request to a vulnerable<\/a> endpoint on the target SharePoint server. The malicious serialized object is included in the Authorization header and body. When the SharePoint server deserializes the object, it inadvertently <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-1331-ibm-cics-local-user-code-execution-vulnerability\/\"  data-wpil-monitor-id=\"59960\">executes the attacker&#8217;s code<\/a>. It&#8217;s important to note that this is a conceptual example, and actual exploitation would likely be more complex and require a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49693-a-deep-dive-into-double-free-vulnerability-in-microsoft-brokering-file-system\/\"  data-wpil-monitor-id=\"75322\">deep understanding of Microsoft<\/a> SharePoint&#8217;s internals.<br \/>\nAs a cybersecurity expert, I strongly recommend applying the vendor&#8217;s patch as soon as possible to prevent <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-7457-macos-authorization-model-exploit-leading-to-potential-mitm-attacks\/\"  data-wpil-monitor-id=\"80030\">potential exploits<\/a>. If the patch cannot be applied immediately, consider using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Cybersecurity vulnerabilities come in various forms, and one of the most significant is deserialization of untrusted data. Microsoft Office SharePoint CVE-2025-47163 is a high-risk vulnerability that allows an authorized attacker to execute code over a network. This vulnerability primarily affects users of Microsoft SharePoint, a web-based collaborative platform that integrates with Microsoft Office. The [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[82],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-53318","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53318","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=53318"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53318\/revisions"}],"predecessor-version":[{"id":72451,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53318\/revisions\/72451"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=53318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=53318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=53318"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=53318"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=53318"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=53318"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=53318"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=53318"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=53318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}