{"id":56585,"date":"2025-07-02T00:57:29","date_gmt":"2025-07-02T00:57:29","guid":{"rendered":""},"modified":"2025-09-08T17:19:05","modified_gmt":"2025-09-08T23:19:05","slug":"cve-2025-48954-cross-site-scripting-vulnerability-in-discourse-social-login","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-48954-cross-site-scripting-vulnerability-in-discourse-social-login\/","title":{"rendered":"<strong>CVE-2025-48954: Cross-Site Scripting Vulnerability in Discourse Social Login<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>This blog post discusses a significant cybersecurity vulnerability, classified under CVE-2025-48954, that affects the open-source discussion platform, Discourse. The vulnerability results from an improper content security policy (CSP) handling, leading to a potential cross-site scripting (XSS) attack when using social logins. This issue plagues all <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55010-arbitrary-php-object-instantiation-in-kanboard-prior-to-version-1-2-47\/\"  data-wpil-monitor-id=\"77966\">versions of Discourse prior<\/a> to 3.5.0.beta6.<br \/>\nThe severity of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6292-critical-vulnerability-in-d-link-dir-825-2-03-leads-to-stack-based-buffer-overflow\/\"  data-wpil-monitor-id=\"63009\">vulnerability lies in its potential to compromise systems or lead<\/a> to data leaks, impacting not just individual users but also businesses that leverage Discourse for community engagement. A successful exploit could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43586-adobe-commerce-improper-access-control-vulnerability-leading-to-privilege-escalation\/\"  data-wpil-monitor-id=\"63143\">lead to unauthorized control<\/a> over data and systems, creating a serious security threat.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-48954<br \/>\nSeverity: High (CVSS: 8.1)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5867-critical-vulnerability-in-rt-thread-5-1-0-leading-to-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"63924\">System compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1044711366\" 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>Discourse | Prior to 3.5.0.beta6<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52488-dnn-platform-vulnerability-exposing-ntlm-hashes-to-third-party-smb-server\/\"  data-wpil-monitor-id=\"64360\">vulnerability arises from the Discourse platform&#8217;s<\/a> failure to enforce a content security policy when using social logins. An attacker can exploit this flaw by <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8714-critical-postgresql-vulnerability-allowing-malicious-code-injection-by-superusers\/\"  data-wpil-monitor-id=\"80730\">injecting malicious<\/a> scripts into the webpage. When a user interacts with the infected application, the malicious script is executed, potentially leading to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49651-critical-unauthorized-access-vulnerability-in-backendai\/\"  data-wpil-monitor-id=\"63033\">unauthorized access<\/a> to sensitive data or control over the system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1467889263\" 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>Here&#8217;s a conceptual example of how an attacker might exploit this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48921-cross-site-request-forgery-vulnerability-in-drupal-open-social\/\"  data-wpil-monitor-id=\"64997\">vulnerability using an HTTP request<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/social_login HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n&quot;callback_url&quot;: &quot;javascript:malicious_code_here&quot;\n}<\/code><\/pre>\n<p>In this pseudo-code, the &#8220;callback_url&#8221; contains malicious JavaScript <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49132-critical-arbitrary-code-execution-vulnerability-in-pterodactyl-game-server-management-panel\/\"  data-wpil-monitor-id=\"63288\">code that can execute<\/a> when the user interacts with the social login feature.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>The recommended solution to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3319-an-authentication-bypass-vulnerability-in-ibm-spectrum-protect-server\/\"  data-wpil-monitor-id=\"64375\">protect against this vulnerability<\/a> is to upgrade to Discourse version 3.5.0.beta6 or later, which contains a patch for the issue. If an upgrade is not immediately possible, users should ensure that the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2443-gitlab-ee-cross-site-scripting-xss-and-content-security-policy-bypass-vulnerability\/\"  data-wpil-monitor-id=\"65342\">content security policy<\/a> is enabled as a temporary workaround. Using Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) can also provide temporary protection against <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-7457-macos-authorization-model-exploit-leading-to-potential-mitm-attacks\/\"  data-wpil-monitor-id=\"80052\">potential exploits<\/a>. However, these measures should be seen as temporary fixes, and users are advised to apply the vendor patch for complete resolution of the vulnerability.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview This blog post discusses a significant cybersecurity vulnerability, classified under CVE-2025-48954, that affects the open-source discussion platform, Discourse. The vulnerability results from an improper content security policy (CSP) handling, leading to a potential cross-site scripting (XSS) attack when using social logins. This issue plagues all versions of Discourse prior to 3.5.0.beta6. The severity of [&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-56585","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\/56585","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=56585"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56585\/revisions"}],"predecessor-version":[{"id":73151,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56585\/revisions\/73151"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=56585"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=56585"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=56585"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=56585"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=56585"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=56585"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=56585"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=56585"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=56585"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}