{"id":56612,"date":"2025-07-02T08:00:32","date_gmt":"2025-07-02T08:00:32","guid":{"rendered":""},"modified":"2025-09-10T11:37:51","modified_gmt":"2025-09-10T17:37:51","slug":"cve-2025-29976-improper-privilege-management-vulnerability-in-microsoft-office-sharepoint","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-29976-improper-privilege-management-vulnerability-in-microsoft-office-sharepoint\/","title":{"rendered":"<strong>CVE-2025-29976: Improper Privilege Management Vulnerability in Microsoft Office SharePoint<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In the realm of cybersecurity, managing system privileges is a critical aspect of maintaining data security. Recently, a new vulnerability identified as CVE-2025-29976 has come to light, having a substantial impact on Microsoft Office SharePoint. This vulnerability allows an authorized user to elevate their privileges within the system, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4981-critical-file-extraction-vulnerability-in-mattermost-leading-to-potential-remote-code-execution\/\"  data-wpil-monitor-id=\"63091\">leading to potential<\/a> data leakage or even full system compromise. Given the widespread usage of SharePoint across various organizations for managing and sharing documents, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-22236-minion-event-bus-authorization-bypass-vulnerability-posing-serious-security-threats\/\"  data-wpil-monitor-id=\"63331\">vulnerability has serious<\/a> implications.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-29976<br \/>\nSeverity: High (CVSS:7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32878-critical-vulnerability-in-coros-pace-3-devices-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"63332\">System compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2650732513\" 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-2025-29978-use-after-free-vulnerability-in-microsoft-office-powerpoint-allowing-unauthorized-local-code-execution\/\"  data-wpil-monitor-id=\"64869\">Microsoft Office<\/a> SharePoint | All versions prior to the patched release<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>This exploit takes advantage of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43586-adobe-commerce-improper-access-control-vulnerability-leading-to-privilege-escalation\/\"  data-wpil-monitor-id=\"63132\">improper privilege<\/a> management within Microsoft Office SharePoint. In essence, an authorized user with low-level privileges can exploit this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49651-critical-unauthorized-access-vulnerability-in-backendai\/\"  data-wpil-monitor-id=\"63034\">vulnerability to gain higher-level access<\/a> rights, which should ideally be restricted. This could be achieved through specific sequences of system requests or commands that manipulate the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-47031-critical-privilege-escalation-vulnerability-in-ncr-terminal-handler\/\"  data-wpil-monitor-id=\"63635\">privilege escalation<\/a> flaw. This unauthorized elevation of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-45347-unauthorized-access-vulnerability-in-xiaomi-mi-connect-service-app\/\"  data-wpil-monitor-id=\"63581\">privilege<\/a> could then be used to perform actions such as accessing sensitive data, modifying system settings, or even taking control of the system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3125941670\" 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>The following is a conceptual representation of how the vulnerability might be exploited. This is not an actual exploit <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49526-out-of-bounds-write-vulnerability-in-illustrator-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"75272\">code but a simplified illustration<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/elevatePrivilege HTTP\/1.1\nHost: vulnerableSharePoint.example.com\nContent-Type: application\/json\n{\n&quot;user&quot;: &quot;lowPrivilegeUser&quot;,\n&quot;action&quot;: &quot;increasePrivilege&quot;,\n&quot;targetLevel&quot;: &quot;admin&quot;\n}<\/code><\/pre>\n<p>In this example, the low <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4334-critical-privilege-escalation-vulnerability-in-simple-user-registration-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"64935\">privilege user<\/a> &#8216;lowPrivilegeUser&#8217; sends a request to elevate their privilege level to &#8216;admin. If the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6370-critical-vulnerability-in-d-link-dir-619l-2-06b01-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"63423\">system is vulnerable<\/a> (i.e., it has not patched against CVE-2025-29976), it would grant this request, leading to privilege escalation.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>The most effective way to mitigate this vulnerability is to apply the vendor-supplied patch. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29977-use-after-free-vulnerability-in-microsoft-office-excel\/\"  data-wpil-monitor-id=\"64982\">Microsoft has already addressed this vulnerability<\/a> in its latest SharePoint updates. Organizations are strongly recommended to update their SharePoint deployments to the patched version as soon as possible.<br \/>\nIn cases where immediate patching is not feasible, temporary mitigation can be achieved through the use of a Web Application Firewall (WAF) or Intrusion Detection Systems (IDS). These tools can help monitor and block suspicious activities that might indicate an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46414-unlimited-pin-attempts-vulnerability-in-api\/\"  data-wpil-monitor-id=\"81238\">attempt to exploit this vulnerability<\/a>. However, these are temporary measures and should not replace the necessary system update.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In the realm of cybersecurity, managing system privileges is a critical aspect of maintaining data security. Recently, a new vulnerability identified as CVE-2025-29976 has come to light, having a substantial impact on Microsoft Office SharePoint. This vulnerability allows an authorized user to elevate their privileges within the system, leading to potential data leakage or [&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":[76],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-56612","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft","attack_vector-privilege-escalation"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56612","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=56612"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56612\/revisions"}],"predecessor-version":[{"id":73688,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56612\/revisions\/73688"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=56612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=56612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=56612"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=56612"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=56612"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=56612"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=56612"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=56612"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=56612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}