Full Report
Multiple vulnerabilities have been discovered in Mozilla products, the most severe of which could allow for arbitrary code execution.Mozilla Firefox is a web browser used to access the Internet.Mozilla Firefox ESR is a version of the web browser intended to be deployed in large organizations.Mozilla Focus for iOS is a private mobile browser that automatically blocks online trackers and most ads.Mozilla Thunderbird is an email client.Mozilla Thunderbird ESR is a version of the email client intended to be deployed in large organizations.Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution. Depending on the privileges associated with the user an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.
Analysis Summary
# Multiple Vulnerabilities in Mozilla Products Could Allow for Arbitrary Code Execution
Multiple vulnerabilities have been discovered in Mozilla products, the most severe of which could allow for arbitrary code execution.
## Key Points
- Multiple vulnerabilities were identified in various Mozilla products, including Firefox and Thunderbird.
- The most severe vulnerability could allow an attacker to execute arbitrary code with elevated privileges.
- Vulnerabilities include memory corruption, same-origin policy bypass, and uninitialized memory.
- Affected systems include versions prior to 140.2 of Thunderbird and Focus for iOS prior to 142.
## Threat Actors
- No reports of exploitation in the wild have been seen.
- Attribution: Mozilla
## TTPs
- Drive-by compromise using malicious websites (T1189)
- Memory corruption in GMP process (CVE-2025-9179)
- Same-origin policy bypass in Graphics: Canvas2D component (CVE-2025-9180)
- Memory safety bugs present in Firefox ESR 140.1 and Thunderbird ESR 140.1 (CVE-2025-9184)
- Focus for iOS would not respect Content-Disposition header of type Attachment, potentially allowing for XSS attacks (CVE-2025-55032)
## Affected Systems
- Thunderbird versions prior to 140.2
- Thunderbird versions prior to 128.14
- Thunderbird versions prior to 142
- Focus for iOS versions prior to 142
- Firefox versions prior to 142
- Firefox ESR versions prior to 140.2
- Firefox ESR versions prior to 128.14
- Firefox ESR versions prior to 115.27
## Mitigations
- Apply appropriate updates provided by Mozilla to vulnerable systems immediately.
## Conclusion
Multiple vulnerabilities in Mozilla products have been identified, with the most severe allowing for arbitrary code execution. Users are advised to apply updates as soon as possible to minimize risk.