{"id":64221,"date":"2025-08-21T18:16:22","date_gmt":"2025-08-21T18:16:22","guid":{"rendered":""},"modified":"2025-09-16T12:31:57","modified_gmt":"2025-09-16T18:31:57","slug":"cve-2025-8995-critical-authentication-bypass-vulnerability-in-drupal-authenticator-login","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-8995-critical-authentication-bypass-vulnerability-in-drupal-authenticator-login\/","title":{"rendered":"<strong>CVE-2025-8995: Critical Authentication Bypass Vulnerability in Drupal Authenticator Login<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity landscape is forever changing, with new vulnerabilities emerging, posing threats to systems worldwide. One such vulnerability, recently identified with the CVE-2025-8995 identifier, is a serious concern for any organization utilizing Drupal Authenticator Login. This vulnerability, classified as an Authentication Bypass Using an Alternate Path or Channel, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47168-use-after-free-vulnerability-in-microsoft-office-word-allowing-unauthorized-code-execution\/\"  data-wpil-monitor-id=\"73139\">allows attackers an unauthorized<\/a> entry into the system, bypassing the standard authentication process. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53546-high-severity-vulnerability-in-folo-s-github-workflow\/\"  data-wpil-monitor-id=\"73407\">severity of this vulnerability<\/a> is amplified by its potential for system compromise or data leakage, a nightmare scenario for any organization.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-8995<br \/>\nSeverity: Critical (9.8 CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50160-heap-based-buffer-overflow-in-windows-rras-posing-system-compromise-risk\/\"  data-wpil-monitor-id=\"78632\">System compromise<\/a>, potential data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-871937009\" 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>Drupal <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8342-authentication-bypass-vulnerability-in-woocommerce-otp-login-with-phone-number-otp-verification-plugin\/\"  data-wpil-monitor-id=\"76680\">Authenticator Login<\/a> | 0.0.0 to 2.1.3<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The CVE-2025-8995 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54453-path-traversal-vulnerability-in-samsung-magicinfo-9-server\/\"  data-wpil-monitor-id=\"71866\">vulnerability allows attackers to exploit an alternate path<\/a> or channel in the Drupal Authenticator Login. Instead of the standard login procedure, which involves user authentication through the provision of valid credentials, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48903-permission-bypass-vulnerability-in-media-library-module\/\"  data-wpil-monitor-id=\"72876\">vulnerability allows the attacker to bypass<\/a> this protocol entirely. This can be achieved by manipulating the login request to follow the alternate path, which does not necessitate <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5821-critical-authentication-bypass-vulnerability-in-case-theme-user-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"83254\">user authentication<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4053620979\" 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 conceptual example of how an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-9408-server-side-request-forgery-attack-in-eclipse-glassfish\/\"  data-wpil-monitor-id=\"77396\">attacker might exploit this vulnerability using a malicious HTTP request:<\/a><\/p>\n<pre><code class=\"\" data-line=\"\">POST \/drupal\/auth\/login HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n&quot;username&quot;: &quot;admin&quot;,\n&quot;password&quot;: &quot;&quot;,\n&quot;auth_bypass&quot;: &quot;true&quot;\n}<\/code><\/pre>\n<p>In this hypothetical example, the attacker is attempting to gain <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53499-critical-unauthorized-access-vulnerability-in-wikimedia-foundation-mediawiki-abusefilter-extension\/\"  data-wpil-monitor-id=\"72770\">unauthorized access<\/a> by sending an HTTP POST request to the target Drupal site&#8217;s login endpoint. They include an &#8220;auth_bypass&#8221; parameter set to &#8220;true&#8221; in the request body, which triggers the alternate path and allows them to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-44957-ruckus-smartzone-authentication-bypass-vulnerability\/\"  data-wpil-monitor-id=\"74030\">bypass the authentication<\/a> process.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>The best way to mitigate this vulnerability is by applying the vendor-provided patch. Drupal has released an update (version 2.1.4) that fixes this issue. It is recommended that all users upgrade to this version immediately. As a temporary mitigation measure, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help detect and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8059-critical-privilege-escalation-vulnerability-in-b-blocks-wordpress-plugin\/\"  data-wpil-monitor-id=\"76330\">block attempts to exploit this vulnerability<\/a>. However, these should not be considered a long-term solution, and the patch should be applied as soon as possible.<br \/>\nIn conclusion, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49267-serious-sql-injection-vulnerability-in-shabti-kaplan-frontend-admin-by-dynamiapps\/\"  data-wpil-monitor-id=\"77161\">seriousness of the CVE-2025-8995 vulnerability<\/a> cannot be understated. As it allows attackers to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52376-authentication-bypass-vulnerability-in-nexxt-solutions-ncm-x1800-mesh-router\/\"  data-wpil-monitor-id=\"75439\">bypass the authentication<\/a> process entirely, it poses a severe risk to organizations using affected versions of Drupal Authenticator Login. Immediate action is required to mitigate this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27046-critical-memory-corruption-vulnerability-threatening-system-integrity\/\"  data-wpil-monitor-id=\"75038\">vulnerability and secure your systems<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity landscape is forever changing, with new vulnerabilities emerging, posing threats to systems worldwide. One such vulnerability, recently identified with the CVE-2025-8995 identifier, is a serious concern for any organization utilizing Drupal Authenticator Login. This vulnerability, classified as an Authentication Bypass Using an Alternate Path or Channel, allows attackers an unauthorized entry into [&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":[75],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-64221","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-authentication-bypass"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64221","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=64221"}],"version-history":[{"count":14,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64221\/revisions"}],"predecessor-version":[{"id":75797,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64221\/revisions\/75797"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=64221"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=64221"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=64221"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=64221"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=64221"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=64221"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=64221"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=64221"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=64221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}