{"id":73562,"date":"2025-09-10T10:33:49","date_gmt":"2025-09-10T10:33:49","guid":{"rendered":""},"modified":"2025-10-03T12:33:19","modified_gmt":"2025-10-03T18:33:19","slug":"cve-2025-53690-critical-deserialization-of-untrusted-data-vulnerability-in-sitecore-platforms","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-53690-critical-deserialization-of-untrusted-data-vulnerability-in-sitecore-platforms\/","title":{"rendered":"<strong>CVE-2025-53690: Critical Deserialization of Untrusted Data Vulnerability in Sitecore Platforms<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The recently documented vulnerability CVE-2025-53690 is a severe cybersecurity risk affecting Sitecore Experience Manager (XM) and Experience Platform (XP). It exploits a weakness in the deserialization of untrusted data, enabling code injection. This vulnerability is particularly significant as it exposes users of affected versions of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-51055-insecure-data-storage-vulnerability-in-vedo-suite-version-2024-17\/\"  data-wpil-monitor-id=\"81566\">Sitecore<\/a> platforms to potential system compromise and data leakage, undermining the integrity and confidentiality of their data.<br \/>\nThe magnitude of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55293-high-risk-vulnerability-in-meshtastic-s-mesh-networking-solution\/\"  data-wpil-monitor-id=\"81320\">risk<\/a> posed by this vulnerability is underscored by its Common Vulnerability Scoring System (CVSS) Severity Score of 9.0 &#8211; a high rating indicative of the severe level of potential damage. With the widespread use of Sitecore platforms, it&#8217;s crucial to understand the nature of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46658-critical-security-vulnerability-in-exonautweb-s-4c-strategies-exonaut-21-6\/\"  data-wpil-monitor-id=\"82458\">vulnerability and adopt recommended mitigation strategies<\/a> promptly.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-53690<br \/>\nSeverity: Critical (CVSS score: 9.0)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-22404-potential-system-compromise-due-to-use-after-free-vulnerability\/\"  data-wpil-monitor-id=\"85617\">System compromise<\/a>, data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1659547992\" 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: 720px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 22px; font-weight: 600; display: flex; align-items: center; letter-spacing: -0.02em;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 10px;\">\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: 42px; height: 42px;\" \/>\r\n    <\/a>\r\n    Share secrets securely\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 14px; color: #d1d5db;\">\r\n    Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 18px; color: #a1a1aa;\">\r\n    Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 24px; color: #e4e4e7;\">\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Encrypted identity<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Private Spaces for organizations and teams<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 End-to-end encrypted chat, calls, files, and notes<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Sensitive AI work and protected collaboration<\/li>\r\n    <li>\u2022 Built for information that cannot leak<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px; color: #ffffff;\">\r\n    Our mission is to secure human work alongside AI.\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: 8px; font-weight: 500;\">\r\n      Download Ameeba\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Learn More\r\n    <\/a>\r\n  <\/div>\r\n<\/div><\/div>\n<p>Product | Affected Versions<\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53691-deserialization-of-untrusted-data-vulnerability-in-sitecore-experience-manager-and-platform\/\"  data-wpil-monitor-id=\"87797\">Sitecore Experience Manager<\/a> (XM) | Up to and including 9.0<br \/>\nSitecore Experience Platform (XP) | Up to and including 9.0<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The CVE-2025-53690 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45765-ruby-jwt-weak-encryption-vulnerability-revealed\/\"  data-wpil-monitor-id=\"81401\">vulnerability takes advantage of a weakness<\/a> in the deserialization process of untrusted data in Sitecore platforms. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53583-untrusted-data-deserialization-vulnerability-in-employee-spotlight\/\"  data-wpil-monitor-id=\"85773\">Deserialization is the process of converting data<\/a> from a flat format into a structured one. If this process doesn&#8217;t properly validate or sanitize the input data, an attacker can inject harmful <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54948-pre-authenticated-remote-code-execution-vulnerability-in-trend-micro-apex-one\/\"  data-wpil-monitor-id=\"81139\">code that the application will unwittingly execute<\/a>. This can lead to unauthorized <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27689-dell-idrac-tools-improper-access-control-vulnerability\/\"  data-wpil-monitor-id=\"81472\">access or control<\/a> over system resources, which in turn can result in data breaches or system compromise.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4194629712\" 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>Consider the following conceptual example of an HTTP <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49382-cross-site-request-forgery-vulnerability-in-jobzilla-wordpress-theme\/\"  data-wpil-monitor-id=\"81150\">request that exploits the vulnerability<\/a>. Please note this is a hypothetical example and does not represent actual malicious code.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/Sitecore\/Endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;serialized_object&quot;: &quot;{ \\&quot;__type\\&quot;: \\&quot;TypeConverter, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\\&quot;, \\&quot;AssemblyName\\&quot;: \\&quot;System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\\&quot;, \\&quot;PropertyName\\&quot;: \\&quot;AttackPayload\\&quot;, \\&quot;IncompleteDeserialization\\&quot;: true}&quot; }<\/code><\/pre>\n<p>In this example, the malicious payload is embedded in a serialized object. When the Sitecore server deserializes this object, it can trigger the execution of the malicious payload, causing <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-45134-critical-vulnerability-in-mahara-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"82895\">potential harm to the system<\/a> or data.<\/p>\n<p><strong>Recommended Mitigation<\/strong><\/p>\n<p>The recommended mitigation for CVE-2025-53690 is to apply the vendor-supplied patch as soon as possible. In the interim, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can offer a measure of temporary mitigation. However, these should not be considered long-term solutions as they do not <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-58280-object-heap-address-exposure-vulnerability-in-ark-ets\/\"  data-wpil-monitor-id=\"87244\">address the root cause of the vulnerability<\/a>. Regular patching and updating of software is a fundamental aspect of maintaining robust <a href=\"https:\/\/www.ameeba.com\/blog\/introducing-the-ameeba-cybersecurity-group-chat\/\"  data-wpil-monitor-id=\"88530\">cybersecurity<\/a> defenses.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The recently documented vulnerability CVE-2025-53690 is a severe cybersecurity risk affecting Sitecore Experience Manager (XM) and Experience Platform (XP). It exploits a weakness in the deserialization of untrusted data, enabling code injection. This vulnerability is particularly significant as it exposes users of affected versions of Sitecore platforms to potential system compromise and data leakage, [&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":[],"product":[],"attack_vector":[78],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-73562","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-injection"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73562","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=73562"}],"version-history":[{"count":13,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73562\/revisions"}],"predecessor-version":[{"id":81336,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73562\/revisions\/81336"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=73562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=73562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=73562"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=73562"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=73562"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=73562"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=73562"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=73562"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=73562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}