{"id":53826,"date":"2025-06-20T20:56:52","date_gmt":"2025-06-20T20:56:52","guid":{"rendered":""},"modified":"2025-09-03T03:47:24","modified_gmt":"2025-09-03T09:47:24","slug":"cve-2025-25264-critical-vulnerability-allowing-unauthenticated-remote-access-due-to-overly-permissive-cors-policy","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-25264-critical-vulnerability-allowing-unauthenticated-remote-access-due-to-overly-permissive-cors-policy\/","title":{"rendered":"<strong>CVE-2025-25264: Critical Vulnerability Allowing Unauthenticated Remote Access due to Overly Permissive CORS Policy<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>Today we are breaking down a critical vulnerability, CVE-2025-25264, which allows an unauthenticated remote attacker to exploit an overly permissive Cross-Origin Resource Sharing (CORS) policy. This vulnerability poses a significant threat to any system that has not yet applied the corresponding patch, potentially leading to serious data leakage or enabling further system compromise. It is of utmost importance that system administrators understand the risks and take action to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39486-rankie-sql-injection-vulnerability-and-mitigation-measures\/\"  data-wpil-monitor-id=\"63845\">mitigate this vulnerability<\/a>.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-25264<br \/>\nSeverity: Critical, CVSS score 8.8<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5866-critical-vulnerability-in-rt-thread-5-1-0-potentially-leading-to-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"63844\">System compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1137871794\" 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>Vendor Product 1 | All <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49137-critical-vulnerability-in-hax-cms-php-prior-to-version-11-0-0\/\"  data-wpil-monitor-id=\"61953\">versions prior<\/a> to 3.0.1<br \/>\nVendor Product 2 | All <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55010-arbitrary-php-object-instantiation-in-kanboard-prior-to-version-1-2-47\/\"  data-wpil-monitor-id=\"77957\">versions prior<\/a> to 2.1.6<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>An <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5353-local-authenticated-attacker-exploit-in-ivanti-workspace-control\/\"  data-wpil-monitor-id=\"61132\">attacker can exploit<\/a> this vulnerability by sending a cross-origin HTTP request to a vulnerable application. The overly permissive CORS policy of the affected application allows the attacker to read the responses to these cross-origin requests, potentially exposing <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49653-exposure-of-sensitive-data-in-lablup-s-backendai\/\"  data-wpil-monitor-id=\"64072\">sensitive data<\/a> or enabling further attacks. Since the attack can be <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41661-unauthenticated-remote-command-execution-vulnerability-due-to-csrf-in-main-web-interface\/\"  data-wpil-monitor-id=\"61131\">executed remotely<\/a>, the attacker does not need to authenticate or interact with a user to successfully exploit the vulnerability.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1531358360\" 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 following conceptual example demonstrates how an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42959-unauthenticated-replay-attack-exploiting-hmac-reuse\/\"  data-wpil-monitor-id=\"71289\">attacker might exploit<\/a> this vulnerability:<\/p>\n<pre><code class=\"\" data-line=\"\">GET \/sensitive\/data HTTP\/1.1\nHost: vulnerable.example.com\nOrigin: attacker.example.com<\/code><\/pre>\n<p>In this example, the attacker sends a GET request from `attacker.example.com` to `vulnerable.example.com` for a resource that contains <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43233-critical-https-proxy-vulnerability-allowing-sensitive-data-access\/\"  data-wpil-monitor-id=\"69314\">sensitive data<\/a>. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31019-authentication-bypass-vulnerability-in-miniorange-password-policy-manager\/\"  data-wpil-monitor-id=\"60310\">vulnerable application&#8217;s overly permissive CORS policy<\/a> allows the attacker&#8217;s domain to read the response, potentially exposing sensitive data.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>To mitigate this vulnerability, apply the patch provided by the vendor as soon as possible. If the patch cannot be applied immediately, consider using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and block exploitation attempts. Additionally, review and update the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50067-critical-vulnerability-in-oracle-application-express-allowing-system-takeover\/\"  data-wpil-monitor-id=\"69315\">application&#8217;s CORS policy to ensure that it only allows<\/a> trusted domains to read responses.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Today we are breaking down a critical vulnerability, CVE-2025-25264, which allows an unauthenticated remote attacker to exploit an overly permissive Cross-Origin Resource Sharing (CORS) policy. This vulnerability poses a significant threat to any system that has not yet applied the corresponding patch, potentially leading to serious data leakage or enabling further system compromise. It [&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-53826","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\/53826","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=53826"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53826\/revisions"}],"predecessor-version":[{"id":70346,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53826\/revisions\/70346"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=53826"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=53826"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=53826"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=53826"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=53826"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=53826"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=53826"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=53826"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=53826"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}