{"id":64379,"date":"2025-08-28T17:48:29","date_gmt":"2025-08-28T17:48:29","guid":{"rendered":""},"modified":"2025-09-14T12:47:37","modified_gmt":"2025-09-14T18:47:37","slug":"cve-2025-49399-critical-csrf-vulnerability-in-basix-nex-forms","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-49399-critical-csrf-vulnerability-in-basix-nex-forms\/","title":{"rendered":"<strong>CVE-2025-49399: Critical CSRF Vulnerability in Basix NEX-Forms<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-49399 represents a critical cybersecurity threat, a Cross-Site Request Forgery (CSRF) vulnerability, that affects Basix NEX-Forms. This vulnerability is particularly dangerous as it allows an attacker to perform actions on a website on behalf of authenticated users without their knowledge, potentially leading to system compromise or data leakage. Given the widespread use of NEX-Forms, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30403-heap-buffer-overflow-vulnerability-in-mvfst-impacts-quic-sessions\/\"  data-wpil-monitor-id=\"82323\">vulnerability has a broad impact<\/a>, affecting numerous websites and users worldwide. Therefore, understanding and addressing this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27046-critical-memory-corruption-vulnerability-threatening-system-integrity\/\"  data-wpil-monitor-id=\"75025\">vulnerability is of utmost importance to protect system<\/a> integrity and data confidentiality.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-49399<br \/>\nSeverity: Critical (8.8 CVSS score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27050-memory-corruption-vulnerability-leading-to-potential-system-compromise-and-data-leakage\/\"  data-wpil-monitor-id=\"74790\">Potential system compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1774200265\" 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>Basix NEX-Forms | Up to 9.1.3<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49895-critical-csrf-vulnerability-in-ithemes-serverbuddy-plugin\/\"  data-wpil-monitor-id=\"78210\">CSRF vulnerability<\/a> is exploited when an attacker tricks a victim into executing unwanted actions on a web application in which they&#8217;re authenticated. The attack works by including a link or script in a page that <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46093-critical-vulnerability-in-liquidfiles-allowing-root-access-via-ftp-site-chmod\/\"  data-wpil-monitor-id=\"74489\">accesses a site<\/a> where the user is known to be authenticated. In the context of this vulnerability, an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-9408-server-side-request-forgery-attack-in-eclipse-glassfish\/\"  data-wpil-monitor-id=\"77278\">attacker can forge a request<\/a> to the Basix NEX-Forms, leading to unauthorized actions.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3068065418\" 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 this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8714-critical-postgresql-vulnerability-allowing-malicious-code-injection-by-superusers\/\"  data-wpil-monitor-id=\"80650\">vulnerability might be exploited using a malicious<\/a> payload in an HTTP POST request:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/nex-forms\/endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nuser_session=ValidUserSession&amp;form_id=1&amp;action=delete<\/code><\/pre>\n<p>In this example, the attacker forges a POST request to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8141-unauthenticated-arbitrary-file-deletion-vulnerability-in-redirection-for-contact-form-7-wordpress-plugin\/\"  data-wpil-monitor-id=\"81382\">delete a form<\/a> on the victim&#8217;s behalf without their knowledge or consent.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>To mitigate this vulnerability, users are advised to apply the vendor patch once it becomes available. Until then, the use of a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can offer temporary mitigation by detecting and preventing CSRF attacks. Regular updating and patching of systems, as well as user education on the dangers of clicking on untrusted links, are crucial in maintaining a strong security posture against such attacks.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-49399 represents a critical cybersecurity threat, a Cross-Site Request Forgery (CSRF) vulnerability, that affects Basix NEX-Forms. This vulnerability is particularly dangerous as it allows an attacker to perform actions on a website on behalf of authenticated users without their knowledge, potentially leading to system compromise or data leakage. Given the widespread use of NEX-Forms, [&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":[90],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-64379","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-csrf"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64379","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=64379"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64379\/revisions"}],"predecessor-version":[{"id":74837,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64379\/revisions\/74837"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=64379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=64379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=64379"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=64379"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=64379"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=64379"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=64379"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=64379"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=64379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}