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I. Basic Information for CVE-2025-2857
Vulnerability Information

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Vulnerability Title
Incorrect handle could lead to sandbox escapes
Source: NVD (National Vulnerability Database)
Vulnerability Description
Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC code. A compromised child process could cause the parent process to return an unintentionally powerful handle, leading to a sandbox escape. The original vulnerability was being exploited in the wild. *This only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 136.0.4, Firefox ESR 128.8.1, and Firefox ESR 115.21.1.
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和Mozilla Firefox ESR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox和Mozilla Firefox ESR都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。 Mozilla Firefox 136.0.4之前版本和Mozilla Firefox ESR 128.8.1之前版本和115.21.1之前版本存在安全漏洞,该漏洞源于受损的子进程可能导致父进程返回意外强大的句柄,从而导致沙箱逃逸。
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 115.21.1 ~ 115.* -
II. Public POCs for CVE-2025-2857
#POC DescriptionSource LinkShenlong Link
1Nonehttps://github.com/RimaRuer/CVE-2025-2857-ExploitPOC Details
2A Firefox and Tor Browser compromised child process could cause the parent process to return an unintentionally powerful handle, leading to a sandbox escapehttps://github.com/ubisoftinc/CVE-2025-2857POC Details
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III. Intelligence Information for CVE-2025-2857
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IV. Related Vulnerabilities
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