{"id":38730,"date":"2025-05-16T23:14:43","date_gmt":"2025-05-16T23:14:43","guid":{"rendered":""},"modified":"2025-07-07T23:52:35","modified_gmt":"2025-07-08T05:52:35","slug":"cve-2025-26846-permission-bypass-vulnerability-in-znuny-ticket-system","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-26846-permission-bypass-vulnerability-in-znuny-ticket-system\/","title":{"rendered":"<strong>CVE-2025-26846: Permission Bypass Vulnerability in Znuny Ticket System<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In the cybersecurity landscape, a new threat has emerged that has potential to compromise systems or lead to data leakage. This vulnerability, identified as CVE-2025-26846, is a major concern particularly for users of Znuny, a popular open-source helpdesk and IT service management (ITSM) solution. The flaw resides in versions of Znuny before 7.1.4 and puts at risk any organization that uses this software to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24022-critical-server-code-execution-vulnerability-in-itop-it-service-management-tool\/\"  data-wpil-monitor-id=\"49847\">manage their customer support and IT service<\/a> needs.<br \/>\nThe vulnerability is significant due to its high CVSS Severity Score of 9.8, indicating that it can have a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-49126-critical-vulnerability-in-solid-edge-se2023-allows-for-potential-system-compromise\/\"  data-wpil-monitor-id=\"43606\">critical impact on systems<\/a>, and because it bypasses the permission checks when updating ticket metadata. This could allow an attacker to manipulate the system in an unauthorized manner, which can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4347-d-link-router-buffer-overflow-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"43605\">lead to system<\/a> compromise or data leakage if not promptly addressed.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-26846<br \/>\nSeverity: Critical &#8211; 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-2025-4372-webaudio-heap-corruption-in-google-chrome-a-potential-gateway-to-system-compromise-and-data-leakage\/\"  data-wpil-monitor-id=\"43802\">System compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2703786214\" 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>Znuny | Before 7.1.4<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability occurs due to insufficient <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-26847-unmasked-passwords-vulnerability-in-znuny-support-bundle-generation\/\"  data-wpil-monitor-id=\"45843\">permission checks when using the Generic Interface to update ticket<\/a> metadata within Znuny. This means an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46739-unauthenticated-brute-force-attack-leads-to-account-compromise\/\"  data-wpil-monitor-id=\"46398\">unauthenticated attacker<\/a> could exploit this flaw by sending a carefully crafted request to the Generic Interface, thereby manipulating ticket metadata in an unauthorized manner.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-937381660\" 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<br \/>\n<strong>conceptual<\/strong><br \/>\n example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45997-exploiting-file-upload-vulnerability-in-web-based-pharmacy-product-management-system\/\"  data-wpil-monitor-id=\"58416\">vulnerability might be exploited<\/a>. This example involves a malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4829-critical-buffer-overflow-vulnerability-in-totolink-http-post-request-handler\/\"  data-wpil-monitor-id=\"58417\">HTTP request<\/a> that is sent to the Generic Interface.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/znuny\/generic\/updateTicket HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n&quot;TicketID&quot;: &quot;12345&quot;,\n&quot;Subject&quot;: &quot;Malicious Subject&quot;,\n&quot;DataLeak&quot;: &quot;Sensitive Data...&quot;\n}<\/code><\/pre>\n<p>In this example, the attacker is exploiting the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47462-cross-site-request-forgery-vulnerability-in-ohidul-islam-challan-leading-to-privilege-escalation\/\"  data-wpil-monitor-id=\"43662\">vulnerability by sending a malicious POST request<\/a> to the &#8216;updateTicket&#8217; endpoint of the Generic Interface. They are updating the Subject and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-49835-memory-corruption-vulnerability-leading-to-potential-data-leakage-or-system-compromise\/\"  data-wpil-monitor-id=\"58415\">potentially adding sensitive data<\/a> to the ticket without proper authorization.<\/p>\n<p><strong>Mitigation and Prevention<\/strong><\/p>\n<p>Users are strongly advised to upgrade to Znuny version 7.1.4 or later, which <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52890-critical-acl-bypass-vulnerability-in-incus-system-container-and-virtual-machine-manager\/\"  data-wpil-monitor-id=\"64731\">contains a fix for this vulnerability<\/a>. If immediate patching is not possible, organizations can utilize a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. However, these should not be seen as long-term solutions, and systems should be patched as soon as possible to close this serious <a href=\"https:\/\/www.ameeba.com\/blog\/boosting-digital-security-leveraging-the-european-vulnerability-database-enisa\/\"  data-wpil-monitor-id=\"44924\">security vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In the cybersecurity landscape, a new threat has emerged that has potential to compromise systems or lead to data leakage. This vulnerability, identified as CVE-2025-26846, is a major concern particularly for users of Znuny, a popular open-source helpdesk and IT service management (ITSM) solution. The flaw resides in versions of Znuny before 7.1.4 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":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-38730","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\/38730","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=38730"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/38730\/revisions"}],"predecessor-version":[{"id":58202,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/38730\/revisions\/58202"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=38730"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=38730"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=38730"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=38730"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=38730"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=38730"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=38730"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=38730"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=38730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}