{"id":30523,"date":"2025-04-24T15:08:29","date_gmt":"2025-04-24T15:08:29","guid":{"rendered":""},"modified":"2025-06-06T05:17:46","modified_gmt":"2025-06-06T11:17:46","slug":"cve-2025-27287-critical-deserialization-of-untrusted-data-vulnerability-in-ss-quiz","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-27287-critical-deserialization-of-untrusted-data-vulnerability-in-ss-quiz\/","title":{"rendered":"<strong>CVE-2025-27287: Critical Deserialization of Untrusted Data Vulnerability in SS Quiz<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In today&#8217;s post, we delve into an alarming vulnerability identified as CVE-2025-27287. This severe security flaw resides in the popular software, ssvadim SS Quiz, versions up to and including 2.0.5. The issue lies in the deserialization of untrusted data, which allows for <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-52200-cross-site-request-forgery-csrf-leading-to-php-object-injection-in-armember-wordpress-plugin\/\"  data-wpil-monitor-id=\"35376\">object injection<\/a>. Given the ubiquity of SS Quiz in numerous systems, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30727-unpatched-vulnerability-in-oracle-scripting-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"35788\">vulnerability has the potential<\/a> to affect a wide scope of users and organizations.<br \/>\nThe relevance of this vulnerability cannot be overstated. It scores a high 9.8 on the CVSS Severity Scale, <a href=\"https:\/\/www.ameeba.com\/blog\/demystifying-cybersecurity-indicators-the-power-of-iocs-iobs-and-ioas-in-threat-detection-and-prevention\/\"  data-wpil-monitor-id=\"36482\">indicating its severe threat<\/a> level. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-50123-exploitable-vulnerability-in-hozard-alarm-system-sms-authentication\/\"  data-wpil-monitor-id=\"34918\">Exploitation of this vulnerability can lead to system<\/a> compromise and data leakage &#8211; a nightmare scenario for any system administrator or user.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-27287<br \/>\nSeverity: Critical (9.8\/10)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3914-potential-arbitrary-file-uploads-and-system-compromise-in-aeropage-sync-for-airtable-wordpress-plugin\/\"  data-wpil-monitor-id=\"40714\">System compromise<\/a>, data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-253489279\" 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>ssvadim SS Quiz | n\/a through 2.0.5<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability arises from the application&#8217;s failure to properly validate and sanitize user-supplied input during the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30985-critical-deserialization-vulnerability-in-notfound-gnucommerce\/\"  data-wpil-monitor-id=\"34882\">data<\/a> deserialization process. In a nutshell, deserialization is the process of converting serialized <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27286-deserialization-of-untrusted-data-leads-to-object-injection-in-saoshyant-slider\/\"  data-wpil-monitor-id=\"36996\">data<\/a> from a complex object to a stream of bytes, and back into the object. In this case, an attacker can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2105-php-object-injection-vulnerability-in-jupiter-x-core-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"40713\">inject malicious serialized objects<\/a> into the application. When the application deserializes these malicious objects, it can execute harmful actions, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-22900-stack-overflow-vulnerability-in-totolink-n600r-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"35183\">potentially leading to full system<\/a> compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3126050951\" 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&#8217;s a simplified conceptual example of how the vulnerability might be exploited. An attacker could send a specially crafted HTTP <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39601-cross-site-request-forgery-vulnerability-in-wpfactory-custom-css-js-php\/\"  data-wpil-monitor-id=\"36047\">request to the vulnerable<\/a> endpoint, like this:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/ssquiz\/submitQuiz HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;serializedObject&quot;: &quot;rO0ABXNyAC5qYXZhLnV0aWwuSGFzaE1hcAUH2sHDFmDRAwACRgAKbG9hZEZhY3RvckkACXRocmVzaG9sZHhwP0AAAAAAAAx3CAAAABAAAAAAeHg=&quot; }<\/code><\/pre>\n<p>In this example, the serializedObject field contains a Base64 encoded serialized object. If the object&#8217;s class has a readObject method, the method will be executed upon deserialization, leading to the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32433-unauthenticated-remote-code-execution-vulnerability-in-erlang-otp-ssh-server\/\"  data-wpil-monitor-id=\"36481\">execution of potentially malicious code<\/a>.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>The most <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=\"55144\">direct mitigation for this vulnerability<\/a> is to apply patches provided by the vendor. If patches are not available or cannot be applied immediately, it is recommended to use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) to detect and block potential exploit attempts.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In today&#8217;s post, we delve into an alarming vulnerability identified as CVE-2025-27287. This severe security flaw resides in the popular software, ssvadim SS Quiz, versions up to and including 2.0.5. The issue lies in the deserialization of untrusted data, which allows for object injection. Given the ubiquity of SS Quiz in numerous systems, this [&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-30523","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\/30523","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=30523"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/30523\/revisions"}],"predecessor-version":[{"id":49281,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/30523\/revisions\/49281"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=30523"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=30523"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=30523"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=30523"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=30523"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=30523"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=30523"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=30523"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=30523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}