CVE-2025-2857
Scores
EPSS
Percentile: 0.1%
CVSS
CVSS Score: 10.0/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Changed (C)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
High (H)
Measures the impact to the confidentiality of information
Integrity Impact
High (H)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
High (H)
Measures the impact to the availability of the impacted component
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 affects Firefox < 136.0.4, Firefox ESR < 128.8.1, and Firefox ESR < 115.21.1.
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Sources
Related Vulnerabilities
Vulnerable Software (4)
Type: Configuration
Product: firefox
Operating System: debian
{ "unaffected": true}
Source: debian
Type: Configuration
Product: firefox-esr
Operating System: debian
{ "unaffected": true}
Source: debian
Type: Configuration
Vendor: mozilla
Product: firefox
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "versionEndExcluding": "136.0.4", "vulnerable": true } ], "operator": "OR"}
Source: nvd
Type: Configuration
Vendor: mozilla
Product: firefox
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "versionEndExcluding": "115.21.1", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:mo...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "versionEndExcluding": "115.21.1", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "versionEndExcluding": "128.8.1", "versionStartIncluding": "128.1.0", "vulnerable": true } ], "operator": "OR"}
Source: nvd