{"id":73467,"date":"2025-09-10T01:30:08","date_gmt":"2025-09-10T01:30:08","guid":{"rendered":""},"modified":"2025-11-02T06:37:36","modified_gmt":"2025-11-02T12:37:36","slug":"cve-2025-26210-deepseek-xss-vulnerability-allows-potential-system-compromise","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-26210-deepseek-xss-vulnerability-allows-potential-system-compromise\/","title":{"rendered":"<strong>CVE-2025-26210: DeepSeek XSS Vulnerability Allows Potential System Compromise<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>DeepSeek, commonly used for its robust data aggregation capabilities, has recently been found to have a significant vulnerability in versions R1 through V3.1. This vulnerability, tagged as CVE-2025-26210, exposes users to potential Cross-Site Scripting (XSS) attacks. XSS remains one of the most prevalent security risks on the web, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54594-critical-vulnerability-in-react-native-bottom-tabs-library-allows-for-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"82247\">allowing attackers to inject malicious code<\/a> into web pages viewed by other users. This vulnerability is particularly concerning as it can lead to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-51055-insecure-data-storage-vulnerability-in-vedo-suite-version-2024-17\/\"  data-wpil-monitor-id=\"81578\">system<\/a> compromise or data leakage, making it a high-risk issue that demands immediate attention from all affected parties.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-26210<br \/>\nSeverity: High, with a CVSS score of 8.8<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: Successful exploitation can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-45134-critical-vulnerability-in-mahara-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"82844\">lead to system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2751356612\" 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: 720px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 22px; font-weight: 600; display: flex; align-items: center; letter-spacing: -0.02em;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 10px;\">\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: 42px; height: 42px;\" \/>\r\n    <\/a>\r\n    Share secrets securely\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 14px; color: #d1d5db;\">\r\n    Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 18px; color: #a1a1aa;\">\r\n    Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 24px; color: #e4e4e7;\">\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Encrypted identity<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Private Spaces for organizations and teams<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 End-to-end encrypted chat, calls, files, and notes<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Sensitive AI work and protected collaboration<\/li>\r\n    <li>\u2022 Built for information that cannot leak<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px; color: #ffffff;\">\r\n    Our mission is to secure human work alongside AI.\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: 8px; font-weight: 500;\">\r\n      Download Ameeba\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Learn More\r\n    <\/a>\r\n  <\/div>\r\n<\/div><\/div>\n<p>Product | Affected Versions<\/p>\n<p>DeepSeek | R1 through V3.1<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8730-critical-vulnerability-in-belkin-routers-due-to-hard-coded-credentials\/\"  data-wpil-monitor-id=\"81081\">vulnerability is due<\/a> to insufficient sanitizing of user-supplied inputs in the `run-html-chat.deepseeksvc.com` domain. An attacker can exploit this weakness by sending a specially crafted input to the affected software, which then <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55420-reflected-cross-site-scripting-xss-vulnerability-in-foxcms-v1-2-6\/\"  data-wpil-monitor-id=\"84420\">reflects the malicious script<\/a> on the web page. When an unsuspecting user interacts with the infected web page, the malicious script gets executed within the context of the victim&#8217;s browser, potentially <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47174-heap-based-buffer-overflow-in-microsoft-office-excel-leading-to-unauthorized-code-execution\/\"  data-wpil-monitor-id=\"82026\">leading to unauthorized<\/a> actions.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3361193414\" 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>A potential exploit might look something like this:<\/p>\n<pre><code class=\"\" data-line=\"\">GET \/chat?nickname=&lt;script&gt;malicious_code_here&lt;\/script&gt; HTTP\/1.1\nHost: run-html-chat.deepseeksvc.com<\/code><\/pre>\n<p>In this example, `<script>malicious_code_here<\/script>` is the injected JavaScript code. When a user views the webpage, the malicious JavaScript <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54948-pre-authenticated-remote-code-execution-vulnerability-in-trend-micro-apex-one\/\"  data-wpil-monitor-id=\"81128\">code is executed<\/a> in their browser.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>Until a vendor patch is available, the recommended mitigation method is to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and block potential XSS attempts. It is also advised to not click on untrusted links and be wary of unexpected behavior on the `run-html-chat.deepseeksvc.com` domain.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview DeepSeek, commonly used for its robust data aggregation capabilities, has recently been found to have a significant vulnerability in versions R1 through V3.1. This vulnerability, tagged as CVE-2025-26210, exposes users to potential Cross-Site Scripting (XSS) attacks. XSS remains one of the most prevalent security risks on the web, allowing attackers to inject malicious code [&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":[81],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-73467","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-xss"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73467","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=73467"}],"version-history":[{"count":7,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73467\/revisions"}],"predecessor-version":[{"id":77201,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73467\/revisions\/77201"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=73467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=73467"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=73467"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=73467"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=73467"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=73467"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=73467"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=73467"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=73467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}