{"id":47516,"date":"2025-06-02T00:49:03","date_gmt":"2025-06-02T00:49:03","guid":{"rendered":""},"modified":"2025-09-02T21:13:35","modified_gmt":"2025-09-03T03:13:35","slug":"cve-2025-48828-arbitrary-php-code-execution-in-vbulletin-via-template-conditionals","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-48828-arbitrary-php-code-execution-in-vbulletin-via-template-conditionals\/","title":{"rendered":"<strong>CVE-2025-48828: Arbitrary PHP Code Execution in vBulletin Via Template Conditionals<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The world of cybersecurity is no stranger to vulnerabilities, and one that has recently come to light is the CVE-2025-48828. This vulnerability has been identified in certain versions of vBulletin, a popular forum software used by many websites. The vulnerability is particularly dangerous as it allows attackers to execute arbitrary PHP code, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-26625-linux-kernel-vulnerability-leading-to-potential-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"53080\">potentially compromising systems or leaking sensitive data<\/a>. This is extremely concerning for organizations that use vBulletin, as an attack could result in significant damage to their reputation and financial standing.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-48828<br \/>\nSeverity: Critical (9.0 CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31049-untrusted-data-deserialization-vulnerability-in-themeton-dash-exposes-systems-to-object-injection\/\"  data-wpil-monitor-id=\"54329\">System compromise and data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3620637732\" 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>vBulletin | Unspecified versions affected<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploitation of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-22040-race-condition-vulnerability-in-linux-kernel-resulting-in-potential-system-compromise\/\"  data-wpil-monitor-id=\"59855\">vulnerability revolves around the abuse of Template Conditionals<\/a> in vBulletin&#8217;s template engine. Attackers can craft template code in an alternative <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48827-unauthenticated-api-invocation-in-vbulletin-on-php-8-1-and-later\/\"  data-wpil-monitor-id=\"56019\">PHP function invocation<\/a> syntax, such as the &#8220;var_dump&#8221;(&#8220;test&#8221;) syntax. This allows them to bypass the security checks ordinarily in place and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-51360-remote-code-execution-vulnerability-in-hospital-management-system-in-php-v4-0\/\"  data-wpil-monitor-id=\"54328\">execute arbitrary PHP code<\/a>. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3835-remote-code-execution-vulnerability-in-zohocorp-manageengine-exchange-reporter-plus\/\"  data-wpil-monitor-id=\"59854\">vulnerability was reportedly<\/a> exploited in the wild in May 2025, indicating that it is not simply theoretical but has real-world implications.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-263575022\" 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 conceptual example of how the vulnerability might be exploited. Remember that this is a simplified example for <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49526-out-of-bounds-write-vulnerability-in-illustrator-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"75141\">illustrative purposes and not a real-world exploit code<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\">$template = $vbulletin-&gt;template;\n$template-&gt;conditionals[&#039;test&#039;] = &quot;var_dump\\&quot;(system(&#039;ls&#039;))\\&quot;&quot;;\n$template-&gt;render();<\/code><\/pre>\n<p>In this example, an attacker alters the &#8216;test&#8217; conditional to use the &#8220;var_dump&#8221; function to invoke the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3499-unauthenticated-rest-apis-expose-system-to-os-command-injection-attacks\/\"  data-wpil-monitor-id=\"77678\">&#8216;system&#8217; function with the &#8216;ls&#8217; command<\/a> as argument. When the template is rendered, it executes the &#8216;ls&#8217; command, demonstrating <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3357-arbitrary-code-execution-vulnerability-in-ibm-tivoli-monitoring\/\"  data-wpil-monitor-id=\"56391\">arbitrary code execution<\/a>.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>To protect your <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30171-critical-system-file-deletion-vulnerability-in-aspect-systems\/\"  data-wpil-monitor-id=\"53079\">systems from this vulnerability<\/a>, the best course of action is to apply a patch from the vendor as soon as it becomes available. If a patch is not yet available, or if you are unable to apply it immediately, you can turn to temporary mitigation measures such as implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS). These can help <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45984-critical-command-injection-vulnerability-detected-in-blink-routers\/\"  data-wpil-monitor-id=\"75142\">detect and block attempts to exploit this vulnerability<\/a>, providing an extra layer of security while you work on a more permanent solution.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The world of cybersecurity is no stranger to vulnerabilities, and one that has recently come to light is the CVE-2025-48828. This vulnerability has been identified in certain versions of vBulletin, a popular forum software used by many websites. The vulnerability is particularly dangerous as it allows attackers to execute arbitrary PHP code, potentially compromising [&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":[80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-47516","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/47516","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=47516"}],"version-history":[{"count":7,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/47516\/revisions"}],"predecessor-version":[{"id":70080,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/47516\/revisions\/70080"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=47516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=47516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=47516"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=47516"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=47516"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=47516"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=47516"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=47516"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=47516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}