{"id":59800,"date":"2025-08-01T12:26:25","date_gmt":"2025-08-01T12:26:25","guid":{"rendered":""},"modified":"2025-09-03T19:04:11","modified_gmt":"2025-09-04T01:04:11","slug":"cve-2025-6895-authentication-bypass-vulnerability-in-melapress-login-security-plugin-for-wordpress","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6895-authentication-bypass-vulnerability-in-melapress-login-security-plugin-for-wordpress\/","title":{"rendered":"<strong>CVE-2025-6895: Authentication Bypass Vulnerability in Melapress Login Security Plugin for WordPress<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity landscape is an ever-evolving one with new vulnerabilities being discovered daily. The vulnerability we are focusing on for our blog post today is CVE-2025-6895, which exposes a critical security flaw in the Melapress Login Security Plugin for WordPress. This vulnerability is of high concern due to the wide use of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5835-droip-plugin-for-wordpress-unauthorized-access-and-modification-vulnerability\/\"  data-wpil-monitor-id=\"68966\">WordPress and its plugins<\/a>, making it a potential target for cybercriminals worldwide.<br \/>\nThe Melapress Login Security plugin, a widely used security solution for WordPress sites, has been found to have an Authentication <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52448-critical-authorization-bypass-vulnerability-in-salesforce-tableau-server\/\"  data-wpil-monitor-id=\"68817\">Bypass vulnerability<\/a>. The severity of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7549-critical-vulnerability-in-tenda-fh1201-allows-remote-stack-based-buffer-overflow\/\"  data-wpil-monitor-id=\"67696\">vulnerability is particularly high because it allows<\/a> an unauthenticated attacker with knowledge of an arbitrary user meta value to bypass authentication checks and log in as that user, potentially leading to system compromise or data leakage.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6895<br \/>\nSeverity: Critical (CVSS: 9.8)<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=\"78571\">System compromise<\/a>, data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-855020452\" 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>Melapress <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6441-unauthenticated-login-token-generation-vulnerability-in-webinarignition-wordpress-plugin\/\"  data-wpil-monitor-id=\"68909\">Login Security Plugin for WordPress<\/a> | 2.1.0 to 2.1.1<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability lies in the get_valid_user_based_on_token() function of the Melapress <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7692-authentication-bypass-vulnerability-in-orion-login-with-sms-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"69942\">Login Security plugin<\/a>. This function is <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8322-critical-missing-authorization-vulnerability-in-e-school-software-by-ventem\/\"  data-wpil-monitor-id=\"70284\">missing an authorization<\/a> check which would typically verify the authenticity of the user trying to log in. In absence of this check, an attacker can use a known user meta value to trick the function into verifying them as a valid user, thereby granting them <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54378-unauthorized-access-vulnerability-in-hax-cms\/\"  data-wpil-monitor-id=\"68900\">unauthorized access<\/a> to the system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2183371586\" 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 is a conceptual example of how an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42959-unauthenticated-replay-attack-exploiting-hmac-reuse\/\"  data-wpil-monitor-id=\"77324\">attacker might exploit<\/a> this vulnerability:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/wp-login.php HTTP\/1.1\nHost: targetsite.com\nContent-Type: application\/x-www-form-urlencoded\nlog=known_meta_value&amp;pwd=&amp;wp-submit=Log+In<\/code><\/pre>\n<p>In this example, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-9408-server-side-request-forgery-attack-in-eclipse-glassfish\/\"  data-wpil-monitor-id=\"77323\">attacker sends a HTTP POST request<\/a> to the WordPress login page, using a known user meta value as the login (log). As the plugin fails to properly validate the user based on the provided meta value, it grants the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-25268-unauthenticated-adjacent-attacker-accessing-api-endpoint\/\"  data-wpil-monitor-id=\"77728\">attacker access<\/a> to the user&#8217;s account.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>To mitigate this vulnerability, users of the Melapress Login Security <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7696-critical-php-object-injection-vulnerability-in-wordpress-plugin-integration\/\"  data-wpil-monitor-id=\"70863\">Plugin for WordPress<\/a> should apply the vendor&#8217;s patch immediately. If unable to do so, it is recommended to use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary mitigation measure until the patch can be applied.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity landscape is an ever-evolving one with new vulnerabilities being discovered daily. The vulnerability we are focusing on for our blog post today is CVE-2025-6895, which exposes a critical security flaw in the Melapress Login Security Plugin for WordPress. This vulnerability is of high concern due to the wide use of WordPress and [&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-59800","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\/59800","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=59800"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59800\/revisions"}],"predecessor-version":[{"id":70941,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59800\/revisions\/70941"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=59800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=59800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=59800"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=59800"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=59800"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=59800"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=59800"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=59800"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=59800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}