{"id":44775,"date":"2025-05-27T00:49:52","date_gmt":"2025-05-27T00:49:52","guid":{"rendered":""},"modified":"2025-06-03T17:17:47","modified_gmt":"2025-06-03T23:17:47","slug":"cve-2025-39410-critical-deserialization-of-untrusted-data-vulnerability-in-smart-sections-theme-builder-wpbakery-page-builder-addon","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-39410-critical-deserialization-of-untrusted-data-vulnerability-in-smart-sections-theme-builder-wpbakery-page-builder-addon\/","title":{"rendered":"<strong>CVE-2025-39410: Critical Deserialization of Untrusted Data Vulnerability in Smart Sections Theme Builder &#8211; WPBakery Page Builder Addon<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In today&#8217;s blog post, we delve into an important cybersecurity vulnerability, CVE-2025-39410, that has been discovered in the widely used Smart Sections Theme Builder &#8211; WPBakery Page Builder Addon. This vulnerability pertains to deserialization of untrusted data, a common area of vulnerability in web applications that could potentially lead to system compromise or data leakage. It is crucial to understand this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32310-privilege-escalation-vulnerability-in-thememove-quickcal-due-to-csrf\/\"  data-wpil-monitor-id=\"50474\">vulnerability due<\/a> to the widespread use of the affected product across a diverse range of websites.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-39410<br \/>\nSeverity: Critical (9.8\/10)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39401-unrestricted-file-upload-leading-to-potential-system-compromise-in-mojoomla-wpams\/\"  data-wpil-monitor-id=\"52157\">System Compromise<\/a> or Data Leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1883354858\" 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-2025-47453-php-remote-file-inclusion-vulnerability-in-xylus-themes-wp-smart-import\/\"  data-wpil-monitor-id=\"56387\">Smart Sections Theme<\/a> Builder &#8211; WPBakery Page Builder Addon | n\/a through 1.7.8<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit takes advantage of the Deserialization of Untrusted <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-3604-data-validation-vulnerability-in-contact-form-entries-wordpress-plugin\/\"  data-wpil-monitor-id=\"52156\">Data vulnerability<\/a>. In essence, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39349-critical-deserialization-of-untrusted-data-vulnerability-in-ciyashop\/\"  data-wpil-monitor-id=\"52552\">deserialization is the process where data<\/a> is converted from a format suitable for storage or transmission back to an object. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47945-critical-vulnerability-in-donetick-task-management-application-allows-full-account-takeover\/\"  data-wpil-monitor-id=\"51695\">vulnerability arises when an application<\/a> deserializes data without properly validating or sanitizing it. An attacker can manipulate the serialized data to modify the application&#8217;s logic, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47916-critical-remote-code-execution-vulnerability-in-invision-community-5-0-0\/\"  data-wpil-monitor-id=\"50404\">execute arbitrary code<\/a>, or instigate other malicious activities.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2742662432\" 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 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23394-critical-unix-symbolic-link-following-vulnerability-in-opensuse-tumbleweed-cyrus-imapd\/\"  data-wpil-monitor-id=\"54395\">following is a conceptual example of how the vulnerability<\/a> might be exploited. Please note that this is a simplified representation and actual payloads would be more complex.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/themeBuilder\/modify HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;themeData&quot;: &quot;[malicious serialized object]&quot; }<\/code><\/pre>\n<p>In this example, the attacker sends a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4827-critical-buffer-overflow-vulnerability-in-totolink-http-post-request-handler\/\"  data-wpil-monitor-id=\"51342\">POST request<\/a> with a malicious serialized object in the `themeData` field. If the server <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31049-untrusted-data-deserialization-vulnerability-in-themeton-dash-exposes-systems-to-object-injection\/\"  data-wpil-monitor-id=\"53819\">deserializes this object<\/a> without proper validation, the attacker could gain unauthorized control over the system or cause data leakage.<\/p>\n<p><strong>Recommendations for Mitigation<\/strong><\/p>\n<p>Users of the Smart Sections Theme <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4672-privilege-escalation-vulnerability-in-offsprout-page-builder-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"58258\">Builder &#8211; WPBakery Page<\/a> Builder Addon are recommended to immediately apply the patch provided by the vendor. If the patch cannot be applied immediately, users can implement a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation method to guard against <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-22190-critical-gitpython-vulnerability-exposes-windows-systems-to-potential-compromise\/\"  data-wpil-monitor-id=\"51341\">potential exploitation of this vulnerability<\/a>. It is crucial to update the affected product to a patched version as soon as feasible to ensure optimal security.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In today&#8217;s blog post, we delve into an important cybersecurity vulnerability, CVE-2025-39410, that has been discovered in the widely used Smart Sections Theme Builder &#8211; WPBakery Page Builder Addon. This vulnerability pertains to deserialization of untrusted data, a common area of vulnerability in web applications that could potentially lead to system compromise or data [&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-44775","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\/44775","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=44775"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/44775\/revisions"}],"predecessor-version":[{"id":51997,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/44775\/revisions\/51997"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=44775"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=44775"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=44775"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=44775"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=44775"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=44775"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=44775"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=44775"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=44775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}