{"id":56659,"date":"2025-07-02T22:07:36","date_gmt":"2025-07-02T22:07:36","guid":{"rendered":""},"modified":"2025-09-06T12:12:34","modified_gmt":"2025-09-06T18:12:34","slug":"cve-2025-52477-unauthenticated-ssrf-vulnerability-in-octo-sts-github-app","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-52477-unauthenticated-ssrf-vulnerability-in-octo-sts-github-app\/","title":{"rendered":"<strong>CVE-2025-52477: Unauthenticated SSRF Vulnerability in Octo-STS GitHub App<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-52477 is a critical vulnerability found in the Octo-STS GitHub App. This vulnerability allows for unauthenticated Server Side Request Forgery (SSRF), posing a significant threat to the integrity and confidentiality of data. It affects all Octo-STS versions before v0.5.3, making it a pressing concern for a wide array of users.<br \/>\nThis <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4981-critical-file-extraction-vulnerability-in-mattermost-leading-to-potential-remote-code-execution\/\"  data-wpil-monitor-id=\"63087\">vulnerability matters because it can lead to potential<\/a> system compromise or data leakage. Malicious actors can misuse OpenID Connect tokens to trigger internal network requests that reflect <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6560-sapido-wireless-routers-exposure-of-sensitive-information-vulnerability\/\"  data-wpil-monitor-id=\"64466\">sensitive information<\/a>. Thus, it is crucial for users and system administrators to understand the ramifications and steps to mitigate this vulnerability.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-52477<br \/>\nSeverity: High (CVSS: 8.6)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6510-critical-vulnerability-in-netgear-ex6100-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"63672\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2801418188\" 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>Octo-STS GitHub App | All versions before v0.5.3<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability exploits a flaw in the Octo-STS GitHub app, where <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54122-unauthenticated-full-read-ssrf-vulnerability-in-manager-io-manager-accounting-software\/\"  data-wpil-monitor-id=\"72661\">unauthenticated SSRF<\/a> can be triggered by abusing fields in OpenID Connect tokens. An <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49151-unauthenticated-attackers-can-forge-json-web-tokens-in-microsens-nmp-web\/\"  data-wpil-monitor-id=\"64544\">attacker can craft a malicious token<\/a> to initiate internal network requests. These requests can then reflect error logs containing sensitive information, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6370-critical-vulnerability-in-d-link-dir-619l-2-06b01-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"63409\">leading to potential system<\/a> compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-535126862\" 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 the vulnerability might be exploited. This pseudocode represents a malicious payload that an attacker could use to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52478-stored-cross-site-scripting-vulnerability-in-n8n-s-form-trigger-node\/\"  data-wpil-monitor-id=\"79442\">trigger the vulnerability<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/sts\/token HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n&quot;openid&quot;: {\n&quot;nonce&quot;: &quot;malicious_network_request&quot;,\n&quot;audience&quot;: &quot;internal_service&quot;,\n&quot;issuer&quot;: &quot;attacker_controlled_domain&quot;\n}\n}<\/code><\/pre>\n<p>In this example, the attacker manipulates the nonce and audience fields to trigger an internal network request to the &#8220;internal_service&#8221;. The &#8220;issuer&#8221; is set to an attacker-controlled domain, allowing the attacker to receive and exploit the reflected <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6561-exposure-of-sensitive-information-in-hunt-electronic-hybrid-dvr-models\/\"  data-wpil-monitor-id=\"64979\">sensitive information<\/a>.<br \/>\nIt is important to note that this is a simplified representation of the exploit, and actual exploits may involve additional steps and complexities.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-52477 is a critical vulnerability found in the Octo-STS GitHub App. This vulnerability allows for unauthenticated Server Side Request Forgery (SSRF), posing a significant threat to the integrity and confidentiality of data. It affects all Octo-STS versions before v0.5.3, making it a pressing concern for a wide array of users. This vulnerability matters because [&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":[79],"product":[],"attack_vector":[101],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-56659","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-github","attack_vector-ssrf"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56659","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=56659"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56659\/revisions"}],"predecessor-version":[{"id":71875,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56659\/revisions\/71875"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=56659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=56659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=56659"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=56659"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=56659"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=56659"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=56659"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=56659"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=56659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}