{"id":49464,"date":"2025-06-07T10:46:21","date_gmt":"2025-06-07T10:46:21","guid":{"rendered":""},"modified":"2025-09-07T11:38:24","modified_gmt":"2025-09-07T17:38:24","slug":"cve-2025-1731-privilege-escalation-vulnerability-in-usg-flex-h-series-uos-firmware","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-1731-privilege-escalation-vulnerability-in-usg-flex-h-series-uos-firmware\/","title":{"rendered":"<strong>CVE-2025-1731: Privilege Escalation Vulnerability in USG FLEX H Series uOS Firmware<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity landscape is riddled with countless vulnerabilities, each posing a unique threat to systems and data. One such vulnerability, CVE-2025-1731, is a recently discovered flaw that presents a serious risk to enterprises currently using uOS firmware versions V1.20 through V1.31 in the USG FLEX H series. This vulnerability is of particular concern due to its potential to enable an attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5117-wordpress-property-plugin-privilege-escalation-vulnerability\/\"  data-wpil-monitor-id=\"55845\">escalate their privileges<\/a>, potentially leading to a full system compromise or data leakage.<br \/>\nThe <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5124-critical-vulnerability-in-sony-s-snc-series-cameras-due-to-use-of-default-credentials\/\"  data-wpil-monitor-id=\"56454\">vulnerability lies within the PostgreSQL commands and is due<\/a> to an incorrect permission assignment that may be exploited by an authenticated local attacker with low privileges. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46458-critical-cross-site-request-forgery-csrf-vulnerability-leading-to-sql-injection-in-occupancyplan\/\"  data-wpil-monitor-id=\"55461\">vulnerability is critical<\/a> as it allows a malicious actor to gain access to the Linux shell, craft malicious scripts, or modify system configurations with administrator-level access using a stolen token, posing a significant threat to business continuity and data integrity.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-1731<br \/>\nSeverity: High (CVSS: 7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: Potential system compromise or <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48383-django-select2-vulnerability-risking-data-leakage-and-unauthorized-access\/\"  data-wpil-monitor-id=\"56121\">data leakage<\/a><\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3630408431\" 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>USG FLEX H Series uOS Firmware | V1.20 through V1.31<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit is based on the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23386-incorrect-default-permissions-vulnerability-in-opensuse-tumbleweed-package-gerbera\/\"  data-wpil-monitor-id=\"56908\">incorrect permission<\/a> assignments in the PostgreSQL commands. An <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41403-authenticated-sql-injection-vulnerability-in-zohocorp-manageengine-adaudit-plus\/\"  data-wpil-monitor-id=\"55325\">authenticated local attacker with low privileges can exploit this vulnerability<\/a> by crafting malicious scripts or modifying system configurations with administrator-level access through a stolen token. The improperly assigned permissions can be manipulated, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2021-47669-linux-kernel-vulnerability-allowing-potential-system-compromise\/\"  data-wpil-monitor-id=\"58105\">allowing the attacker access to the Linux<\/a> shell. From here, they can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-51392-privilege-escalation-vulnerability-in-openknowledgemaps-headstart-v7\/\"  data-wpil-monitor-id=\"57269\">escalate their privileges<\/a>, enabling them to modify the system configuration, provided the administrator has not logged out and the token remains valid.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2140134340\" 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 representation of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5100-a-double-free-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"56628\">potential exploitation of this vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\"># Obtain the token\ntoken=$(curl -s -d &quot;user=low_privilege_user&amp;pass=low_privilege_pass&quot; http:\/\/localhost\/login)\n# Use the token to access the Linux shell\ncurl http:\/\/localhost\/shell -H &quot;Authorization: Bearer $token&quot;\n# Execute malicious script or modify system configuration\necho &quot;malicious command&quot; | sudo -S bash<\/code><\/pre>\n<p>Please note that this is a conceptual representation of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-7457-macos-authorization-model-exploit-leading-to-potential-mitm-attacks\/\"  data-wpil-monitor-id=\"80007\">potential exploitation<\/a> and is not intended to be a working exploit.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>As a temporary measure, you can use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to monitor and block suspicious activities. However, it is strongly recommended that all users of the affected versions of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48481-critical-vulnerability-in-freescout-prior-to-version-1-8-180\/\"  data-wpil-monitor-id=\"57200\">USG FLEX H Series uOS<\/a> Firmware apply the patch provided by the vendor as soon as possible to mitigate this vulnerability.<br \/>\n<a href=\"https:\/\/www.ameeba.com\/blog\/alabama-state-government-faces-cybersecurity-threat-a-detailed-analysis\/\"  data-wpil-monitor-id=\"56122\">Cybersecurity threats<\/a> such as these are a constant reminder of the importance of staying updated with security patches and implementing robust security measures to protect your systems and data.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity landscape is riddled with countless vulnerabilities, each posing a unique threat to systems and data. One such vulnerability, CVE-2025-1731, is a recently discovered flaw that presents a serious risk to enterprises currently using uOS firmware versions V1.20 through V1.31 in the USG FLEX H series. This vulnerability is of particular concern due [&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":[88],"product":[],"attack_vector":[76],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-49464","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-linux","attack_vector-privilege-escalation"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49464","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=49464"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49464\/revisions"}],"predecessor-version":[{"id":72433,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/49464\/revisions\/72433"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=49464"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=49464"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=49464"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=49464"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=49464"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=49464"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=49464"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=49464"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=49464"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}