{"id":34285,"date":"2025-05-03T00:48:57","date_gmt":"2025-05-03T00:48:57","guid":{"rendered":""},"modified":"2025-10-11T20:46:44","modified_gmt":"2025-10-12T02:46:44","slug":"cve-2025-43865-critical-spoofing-vulnerability-in-react-router-prior-to-version-7-5-2","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-43865-critical-spoofing-vulnerability-in-react-router-prior-to-version-7-5-2\/","title":{"rendered":"<strong>CVE-2025-43865: Critical Spoofing Vulnerability in React Router Prior to Version 7.5.2<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>React Router, a widely used router for the popular JavaScript library, React, has a critical vulnerability in versions on the 7.0 branch prior to version 7.5.2. This vulnerability, identified as CVE-2025-43865, allows potential bad actors to modify pre-rendered data, enabling them to spoof the contents entirely and manipulate the values of the data object passed to the HTML. This exposes <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32849-vulnerability-in-telecontrol-server-basic-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"39228\">systems and applications to potential<\/a> compromise and data leakage, impacting any organization or individual utilizing affected versions of React Router.<br \/>\n<a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32843-sql-injection-vulnerability-in-telecontrol-server-basic-leading-to-authorization-bypass-and-data-manipulation\/\"  data-wpil-monitor-id=\"39229\">Vulnerabilities like this matter because they can lead<\/a> to unauthorized access, manipulation, and potential theft of sensitive data. Given the widespread use of React and the React Router plugin, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-57761-unpatched-sql-injection-vulnerability-in-wegia-web-manager\/\"  data-wpil-monitor-id=\"89758\">vulnerability could have far-reaching implications if left unpatched<\/a>.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-43865<br \/>\nSeverity: High (CVSS: 8.2)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32857-sql-injection-vulnerability-in-telecontrol-server-basic-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"39789\">System compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-878983691\" 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>React Router | 7.0.0 &#8211; 7.5.1<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23176-sql-injection-vulnerability-poses-serious-threat-to-data-security\/\"  data-wpil-monitor-id=\"39939\">vulnerability resides in the way React Router handles pre-rendered data<\/a>. By adding a specific header to the request, an <a href=\"https:\/\/www.ameeba.com\/blog\/ahold-delhaize-cyber-attack-unpacking-the-data-breach-and-its-implications\/\"  data-wpil-monitor-id=\"39227\">attacker can modify pre-rendered data<\/a> and completely spoof its contents. This allows the attacker to modify all the values \u200b\u200bof the data object passed to the HTML, potentially changing what is rendered in the user&#8217;s browser or even <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8714-critical-postgresql-vulnerability-allowing-malicious-code-injection-by-superusers\/\"  data-wpil-monitor-id=\"80703\">injecting malicious<\/a> scripts.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1636402547\" 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 simplified conceptual example of how this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-1305-cross-site-request-forgery-csrf-vulnerability-in-newsblogger-wordpress-theme\/\"  data-wpil-monitor-id=\"42552\">vulnerability might be exploited using a malicious HTTP request:<\/a><\/p>\n<pre><code class=\"\" data-line=\"\">POST \/vulnerable\/endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\nSpoof-Header: &#039;True&#039;\n{ &quot;malicious_payload&quot;: &quot;&lt;script&gt;alert(&#039;This could be a malicious script&#039;)&lt;\/script&gt;&quot; }<\/code><\/pre>\n<p>In this example, the &#8216;Spoof-Header&#8217; added to the request could trigger the vulnerability, and the &#8216;malicious_payload&#8217; could be any <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-35996-cross-site-scripting-attack-in-kunbus-pictory\/\"  data-wpil-monitor-id=\"42850\">script or code the attacker<\/a> wishes to run on the user&#8217;s browser.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>React Router has <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-34028-path-traversal-vulnerability-in-commvault-command-center-innovation-release-11-38\/\"  data-wpil-monitor-id=\"39797\">released a patch in version 7.5.2 that fixes this vulnerability<\/a>. All users are strongly advised to update to this version or later as soon as possible. If immediate patching is not possible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. However, these are not long-term solutions and updating to a patched version is <a href=\"https:\/\/www.ameeba.com\/blog\/uh-cybersecurity-camps-a-crucial-step-towards-securing-our-digital-future\/\"  data-wpil-monitor-id=\"39790\">crucial for security<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview React Router, a widely used router for the popular JavaScript library, React, has a critical vulnerability in versions on the 7.0 branch prior to version 7.5.2. This vulnerability, identified as CVE-2025-43865, allows potential bad actors to modify pre-rendered data, enabling them to spoof the contents entirely and manipulate the values of the data object [&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-34285","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\/34285","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=34285"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/34285\/revisions"}],"predecessor-version":[{"id":82607,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/34285\/revisions\/82607"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=34285"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=34285"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=34285"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=34285"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=34285"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=34285"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=34285"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=34285"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=34285"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}