{"id":59438,"date":"2025-07-17T06:34:47","date_gmt":"2025-07-17T06:34:47","guid":{"rendered":""},"modified":"2025-09-08T18:13:10","modified_gmt":"2025-09-09T00:13:10","slug":"cve-2025-23048-apache-http-server-mod-ssl-access-control-bypass-vulnerability","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-23048-apache-http-server-mod-ssl-access-control-bypass-vulnerability\/","title":{"rendered":"<strong>CVE-2025-23048: Apache HTTP Server Mod_SSL Access Control Bypass Vulnerability<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity community is currently addressing an identified vulnerability in the Apache HTTP Server, specifically within versions 2.4.35 through to 2.4.63. This significant vulnerability, tagged as CVE-2025-23048, has a significant impact on the integrity of Apache servers. Particularly, it <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43209-high-risk-out-of-bounds-access-vulnerability-affecting-multiple-apple-operating-systems\/\"  data-wpil-monitor-id=\"70129\">affects configurations where mod_ssl is used across multiple<\/a> virtual hosts and each restricted to a different set of trusted client certificates.<br \/>\nThis vulnerability matters because, if exploited by a savvy attacker, it can lead to an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-36600-dell-bios-improper-access-control-vulnerability-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"70128\">access control<\/a> bypass by trusted clients, potentially resulting in system compromise or data leakage. This can have massive repercussions for businesses and organizations relying on Apache servers, especially those dealing with <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43233-critical-https-proxy-vulnerability-allowing-sensitive-data-access\/\"  data-wpil-monitor-id=\"70130\">sensitive client data<\/a> or proprietary information.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-23048<br \/>\nSeverity: Critical (9.1 CVSS score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: The attacker can bypass access controls, potentially leading to system compromise or <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53495-unauthorized-access-data-leakage-in-wikimedia-foundation-mediawiki-abusefilter-extension\/\"  data-wpil-monitor-id=\"72528\">data leakage<\/a>.<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-936156551\" 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>Apache <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23317-nvidia-triton-inference-server-http-server-vulnerability\/\"  data-wpil-monitor-id=\"82300\">HTTP Server<\/a> | 2.4.35 &#8211; 2.4.63<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit works by leveraging a flaw in the mod_ssl configurations of Apache HTTP Server. If mod_ssl is configured for multiple virtual hosts, restricted to different sets of trusted client certificates, an attacker can bypass the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52289-broken-access-control-vulnerability-in-magnusbilling-v7-8-5-3\/\"  data-wpil-monitor-id=\"73347\">access control<\/a>. This can occur if a client, deemed trusted for one virtual host, tries to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49707-unauthorized-access-and-spoofing-vulnerability-in-azure-virtual-machines\/\"  data-wpil-monitor-id=\"80800\">access another virtual<\/a> host where SSLStrictSNIVHostCheck is not enabled. The result is an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5835-droip-plugin-for-wordpress-unauthorized-access-and-modification-vulnerability\/\"  data-wpil-monitor-id=\"68956\">unauthorized access<\/a> control bypass and potential system compromise.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3581276568\" 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 is a conceptual example of how the vulnerability might be exploited:<\/p>\n<pre><code class=\"\" data-line=\"\">GET \/restricted\/resource HTTP\/1.1\nHost: compromisedvirtualhost.example.com\nSSL-Session: Resumed\nCert: TrustedClientCert<\/code><\/pre>\n<p>In this case, the &#8220;TrustedClientCert&#8221; that is only supposed to have <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4855-unauthorized-access-vulnerability-in-support-board-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"70961\">access to another virtual host is used to gain unauthorized<\/a> access to a different host. The SSL session is resumed, bypassing the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-57155-a-critical-access-control-vulnerability-in-radar-v1-0-8\/\"  data-wpil-monitor-id=\"76278\">access controls<\/a> in place.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity community is currently addressing an identified vulnerability in the Apache HTTP Server, specifically within versions 2.4.35 through to 2.4.63. This significant vulnerability, tagged as CVE-2025-23048, has a significant impact on the integrity of Apache servers. Particularly, it affects configurations where mod_ssl is used across multiple virtual hosts and each restricted to a [&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":[103],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-59438","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-apache"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59438","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=59438"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59438\/revisions"}],"predecessor-version":[{"id":74813,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59438\/revisions\/74813"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=59438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=59438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=59438"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=59438"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=59438"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=59438"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=59438"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=59438"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=59438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}