{"id":48993,"date":"2025-06-04T22:19:33","date_gmt":"2025-06-04T22:19:33","guid":{"rendered":""},"modified":"2025-06-26T23:21:16","modified_gmt":"2025-06-27T05:21:16","slug":"cve-2025-48336-critical-deserialization-of-untrusted-data-vulnerability-in-thimpress-course-builder","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-48336-critical-deserialization-of-untrusted-data-vulnerability-in-thimpress-course-builder\/","title":{"rendered":"<strong>CVE-2025-48336: Critical Deserialization of Untrusted Data Vulnerability in ThimPress Course Builder<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-48336 vulnerability is a critical security flaw found in the ThimPress Course Builder software. This vulnerability, termed as deserialization of untrusted data, can potentially lead to a complete system compromise or data leakage. It is a widespread <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48481-critical-vulnerability-in-freescout-prior-to-version-1-8-180\/\"  data-wpil-monitor-id=\"57182\">vulnerability affecting all versions<\/a> of Course Builder before 3.6.6.<br \/>\nThis vulnerability is particularly concerning as <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31916-unrestricted-file-upload-vulnerability-in-jp-students-result-management-system-premium\/\"  data-wpil-monitor-id=\"54885\">ThimPress<\/a> Course Builder is a widely used tool in the education sector for creating and managing online courses. As such, a successful exploit could potentially impact a large number of institutions and individuals, leading to a severe breach of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48749-netwrix-directory-manager-s-sensitive-data-exposure-vulnerability\/\"  data-wpil-monitor-id=\"56705\">sensitive data<\/a>.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-48336<br \/>\nSeverity: Critical (9.8)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: System compromise or <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48383-django-select2-vulnerability-risking-data-leakage-and-unauthorized-access\/\"  data-wpil-monitor-id=\"56082\">data leakage<\/a><\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-432068518\" 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>ThimPress Course Builder | All versions before 3.6.6<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability arises from the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31927-uncontrolled-deserialization-vulnerability-in-themeton-acerola\/\"  data-wpil-monitor-id=\"54866\">ThimPress Course Builder&#8217;s handling of data<\/a> serialization and deserialization processes. In particular, the software fails to properly validate and sanitize user-supplied <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32284-untrusted-data-deserialization-vulnerability-in-pet-world\/\"  data-wpil-monitor-id=\"54937\">data before deserializing<\/a> it. An attacker can exploit this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31924-deserialization-of-untrusted-data-vulnerability-in-designthemes-crafts-arts\/\"  data-wpil-monitor-id=\"54924\">vulnerability by sending maliciously crafted serialized data<\/a> to a vulnerable application. Upon deserialization, the malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48828-arbitrary-php-code-execution-in-vbulletin-via-template-conditionals\/\"  data-wpil-monitor-id=\"55763\">code is executed<\/a>, potentially leading to unauthorized code execution, system compromise, or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4253238552\" 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>Below is a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45997-exploiting-file-upload-vulnerability-in-web-based-pharmacy-product-management-system\/\"  data-wpil-monitor-id=\"57183\">vulnerability might be exploited<\/a>. This is a hypothetical HTTP request that sends a malicious serialized <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48205-insecure-direct-object-reference-vulnerability-in-sr-feuser-register-extension-for-typo3\/\"  data-wpil-monitor-id=\"55140\">object to a vulnerable<\/a> endpoint.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/vulnerable\/endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;malicious_payload&quot;: &quot;Serialized_Object_with_Malicious_Code&quot; }<\/code><\/pre>\n<p>Upon receiving this request, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31631-critical-deserialization-vulnerability-in-ancorathemes-fish-house\/\"  data-wpil-monitor-id=\"54867\">vulnerable system would deserialize<\/a> the malicious payload, leading to the execution of the injected malicious code.<\/p>\n<p><strong>Mitigation and Recommendations<\/strong><\/p>\n<p>To mitigate the risk associated with CVE-2025-48336, users of ThimPress Course Builder should immediately update their software to version 3.6.6 or later, where the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-49842-critical-memory-corruption-vulnerability-in-protected-vm-address-space\/\"  data-wpil-monitor-id=\"58856\">vulnerability has been addressed<\/a>.<br \/>\nIn cases where an immediate update is not possible, it is recommended to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. These systems can monitor and block suspicious traffic, reducing the risk of a successful exploit.<br \/>\nAlways be sure to regularly update and patch your <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5100-a-double-free-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"56706\">systems to protect against the latest known vulnerabilities<\/a>. Organizations should also implement robust security strategies, including vulnerability scanning and penetration testing, to proactively identify and address potential <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28389-critical-security-vulnerability-in-openc3-cosmos-v6-0-0-due-to-weak-password-requirements\/\"  data-wpil-monitor-id=\"61583\">security weaknesses<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-48336 vulnerability is a critical security flaw found in the ThimPress Course Builder software. This vulnerability, termed as deserialization of untrusted data, can potentially lead to a complete system compromise or data leakage. It is a widespread vulnerability affecting all versions of Course Builder before 3.6.6. This vulnerability is particularly concerning as ThimPress [&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":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-48993","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/48993","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=48993"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/48993\/revisions"}],"predecessor-version":[{"id":55278,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/48993\/revisions\/55278"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=48993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=48993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=48993"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=48993"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=48993"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=48993"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=48993"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=48993"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=48993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}