Remote Code Execution Vulnerability in Firefox by Mozilla
CVE-2025-11153

7.5HIGH

Key Information:

Vendor

Mozilla

Status
Vendor
CVE Published:
30 September 2025

What is CVE-2025-11153?

CVE-2025-11153 is a remote code execution vulnerability identified in Mozilla Firefox, specifically affecting versions prior to 143.0.3 of the web browser. Mozilla Firefox is widely utilized for internet browsing, and any vulnerabilities within this software can have severe repercussions for organizations relying on it for secure web access. This particular vulnerability allows malicious actors to execute arbitrary code on the affected systems, which could result in unauthorized access to sensitive data, compromise of system integrity, and potential control over the affected machines. The ramifications of such an exploitation could hinder business operations and lead to significant financial and reputational damage.

Potential impact of CVE-2025-11153

  1. Unauthorized Access and Control: The vulnerability enables attackers to execute code remotely, which could lead to unauthorized access to sensitive information and control over affected systems. This control can facilitate further exploits and attacks.

  2. Data Breaches: Organizations may face significant risks of data breaches, leading to the loss of confidential information, intellectual property, and personal data of users or clients, potentially resulting in legal repercussions and loss of customer trust.

  3. Disruption of Services: Exploitation of this vulnerability may cause operational disruptions, impacting the availability of services that rely on Firefox. This disruption could lead to financial losses and deter user engagement, harming business continuity.

Affected Version(s)

Firefox < 143.0.3

References

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nan Wang
.