INFSA-2025:0281: Mozilla Thunderbird security update

Information about definition

Identificator: INFSA-2025:0281

Type: security

Release date: 2025-01-21 18:01:17 UTC

Information about package

Mozilla Thunderbird is a standalone mail and newsgroup client.

Vulnerabilities description

  • CVE-2025-0242

    Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 115.18, Firefox ESR 128.5, Thunderbird 115.18, and Thunderbird 128.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Firefox ESR < 115.19, Thunderbird < 134, and Thunderbird < 128.6.

  • CVE-2025-0243

    Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 128.5, and Thunderbird 128.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.

Severity level

CVE Score CVSS 2.0 Score CVSS 3.x Score CVSS 4.0
NIST — CVE-2025-0242
 no information 8.8 no information
NIST — CVE-2025-0243
 no information 7.5 no information
Critical, important, moderate, low

Updated packages