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I. Basic Information for CVE-2025-5266
Vulnerability Information
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Vulnerability Title
Script element events leaked cross-origin resource status
Source: NVD (National Vulnerability Database)
Vulnerability Description
Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mozilla Firefox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 139之前版本和Firefox ESR 128.11之前版本存在安全漏洞，该漏洞源于脚本元素加载跨源资源导致信息泄露，可能引发XS-Leaks攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
MozillaFirefox 128.11 ~ 128.* -
MozillaThunderbird 128.11 ~ 128.* -
II. Public POCs for CVE-2025-5266
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III. Intelligence Information for CVE-2025-5266
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IV. Related Vulnerabilities
Same product: Firefox
Same vendor: Mozilla
V. Comments for CVE-2025-5266

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