Multiple vulnerabilities in Mozilla Thunderbird ESR

Description

Multiple vulnerabilities were found in Mozilla Thunderbird ESR. Malicious users can exploit these vulnerabilities to bypass security restrictions, spoof user interface, execute arbitrary code, obtain sensitive information, cause denial of service, perform cross-site scripting attack.

Below is a complete list of vulnerabilities:

1. Security vulnerability in can be exploited to bypass security restrictions.
2. Security UI vulnerability can be exploited to spoof user interface.
3. Memory safety vulnerability can be exploited to execute arbitrary code.
4. Information disclosure vulnerability can be exploited to obtain sensitive information.
5. Use after free vulnerability in XSLT can be exploited to cause denial of service or execute arbitrary code.
6. Use after free vulnerability can be exploited to cause denial of service or execute arbitrary code.
7. Cross-site scripting (XSS) vulnerability can be exploited to perform cross-site scripting attack.
8. Use after free vulnerability in Custom Highlight can be exploited to cause denial of service or execute arbitrary code.
9. A remote code execution vulnerability in Microsoft Excel can be exploited remotely to execute arbitrary code.

Original advisories

• MFSA2025-10

Exploitation

Public exploits exist for this vulnerability.

Related products

• Mozilla-Thunderbird-ESR

CVE list

• CVE-2025-1014
  critical
• CVE-2025-0510
  high
• CVE-2025-1017
  critical
• CVE-2025-1013
  high
• CVE-2025-1009
  critical
• CVE-2025-1012
  critical
• CVE-2025-1015
  high
• CVE-2025-1016
  critical
• CVE-2025-1010
  critical
• CVE-2025-1011
  critical

Read more

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