Multiple vulnerabilities in Mozilla Thunderbird ESR

Description

Multiple vulnerabilities were found in Mozilla Thunderbird ESR. Malicious users can exploit these vulnerabilities to execute arbitrary code, bypass security restrictions, cause denial of service, spoof user interface.

Below is a complete list of vulnerabilities:

1. Use-after-free vulnerability in the Audio/Video component can be exploited to cause denial of service or execute arbitrary code.
2. Mitigation bypass vulnerability in the DOM: Security component can be exploited to bypass security restrictions.
3. Race condition vulnerability in the Graphics component can be exploited to cause denial of service.
4. Mitigation bypass vulnerability in the DOM: Core & HTML component can be exploited to bypass security restrictions.
5. Same-origin policy bypass vulnerability in the DOM: Workers component can be exploited to bypass security restrictions.
6. Spoofing vulnerability in Firefox can be exploited to spoof user interface.
7. Same-origin policy bypass vulnerability in the DOM: Notifications component can be exploited to bypass security restrictions.
8. Incorrect boundary conditions vulnerability in the JavaScript: WebAssembly component can be exploited to cause denial of service.
9. Use-after-free vulnerability in the WebRTC: Audio/Video component can be exploited to cause denial of service or execute arbitrary code.

Original advisories

• MFSA2025-91

Related products

• Mozilla-Thunderbird-ESR

CVE list

• CVE-2025-13012
  critical
• CVE-2025-13013
  high
• CVE-2025-13014
  critical
• CVE-2025-13015
  warning
• CVE-2025-13016
  critical
• CVE-2025-13017
  critical
• CVE-2025-13018
  critical
• CVE-2025-13019
  critical
• CVE-2025-13020
  critical

Read more

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