CVE-2025-11153: Vulnerability in Mozilla Firefox
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 143.0.3.
AI Analysis
Technical Summary
This vulnerability involves a JIT miscompilation bug in the JavaScript engine's JIT component of Mozilla Firefox. The flaw could cause the engine to miscompile JavaScript code, potentially leading to unintended behavior or exploitation. It is identified as CVE-2025-11153 and classified under CWE-94 (Improper Control of Generation of Code). The issue was addressed and fixed in Firefox version 143.0.3 as per the official Mozilla security advisory MFSA2025-80.
Potential Impact
The vulnerability has a CVSS 3.1 base score of 7.5 (high severity) with network attack vector, low attack complexity, no privileges required, no user interaction, unchanged scope, no confidentiality impact, high integrity impact, and no availability impact. This indicates that an attacker can remotely exploit the flaw to cause a high integrity impact, such as executing unintended or malicious code due to JIT miscompilation.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 143.0.3. Users and administrators should update affected Firefox installations to version 143.0.3 or later to remediate this issue. No additional mitigation steps are indicated beyond applying the official update.
CVE-2025-11153: Vulnerability in Mozilla Firefox
Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 143.0.3.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a JIT miscompilation bug in the JavaScript engine's JIT component of Mozilla Firefox. The flaw could cause the engine to miscompile JavaScript code, potentially leading to unintended behavior or exploitation. It is identified as CVE-2025-11153 and classified under CWE-94 (Improper Control of Generation of Code). The issue was addressed and fixed in Firefox version 143.0.3 as per the official Mozilla security advisory MFSA2025-80.
Potential Impact
The vulnerability has a CVSS 3.1 base score of 7.5 (high severity) with network attack vector, low attack complexity, no privileges required, no user interaction, unchanged scope, no confidentiality impact, high integrity impact, and no availability impact. This indicates that an attacker can remotely exploit the flaw to cause a high integrity impact, such as executing unintended or malicious code due to JIT miscompilation.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 143.0.3. Users and administrators should update affected Firefox installations to version 143.0.3 or later to remediate this issue. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-09-29T13:22:49.000Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2025-80/","vendor":"Mozilla"}]
Threat ID: 68dc71325d588c52e5de4795
Added to database: 10/01/2025, 00:09:22 UTC
Last enriched: 08/05/2026, 13:37:09 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 723
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