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, obtain sensitive information.

Below is a complete list of vulnerabilities:

1. Use-after-free vulnerability in Graphics: Canvas2D component can be exploited remotely to execute arbitrary code
2. Sandbox escape vulnerability in Canvas2D component can be exploited remotely to execute arbitrary code
3. Same-origin policy bypass vulnerability in Layout component can be exploited to bypass security restrictions
4. Incorrect boundary vulnerability in the JavaScript: GC component can be exploited remotely to execute arbitrary code
5. Integer overflow vulnerability in SVG component can be exploited remotely to execute arbitrary code
6. Information disclosure vulnerability in the Networking: Cache component can be exploited to obtain sensitive information
7. Memory corruption vulnerability can be exploited remotely to execute arbitrary code

Original advisories

• MFSA2025-78

Related products

• Mozilla-Thunderbird-ESR

CVE list

• CVE-2025-10528
  high
• CVE-2025-10529
  high
• CVE-2025-10532
  high
• CVE-2025-10537
  critical
• CVE-2025-10527
  high
• CVE-2025-10533
  critical
• CVE-2025-10536
  high

Read more

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