{"id":59825,"date":"2025-08-02T13:34:40","date_gmt":"2025-08-02T13:34:40","guid":{"rendered":""},"modified":"2025-09-03T19:04:12","modified_gmt":"2025-09-04T01:04:12","slug":"cve-2025-8036-critical-thunderbird-cors-preflight-response-caching-vulnerability","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-8036-critical-thunderbird-cors-preflight-response-caching-vulnerability\/","title":{"rendered":"CVE-2025-8036: Critical Thunderbird CORS Preflight Response Caching Vulnerability<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The Common Vulnerabilities and Exposures (CVE) system has recently identified a critical vulnerability, CVE-2025-8036, in Thunderbird that has significant implications for user security. This flaw affects Firefox and Thunderbird versions prior to 141 and Firefox ESR versions prior to 140.1. It centers on the caching of CORS preflight responses across IP address changes, thereby enabling DNS rebinding and circumvention of CORS. Given the widespread use of these products, the vulnerability has the potential<\/a> to impact a large number of users. It matters because it can potentially lead to system compromise<\/a> or data leakage, posing a serious threat to user privacy and security.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-8036
\nSeverity: Critical (8.1 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: Required
\nImpact: System compromise<\/a> or data leakage due to circumvention of CORS<\/p>\n

Affected Products<\/strong><\/p>

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\r\n \r\n \"Ameeba\r\n <\/a>\r\n Share secrets securely\r\n <\/h2>\r\n\r\n

\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

\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