Important: firefox security update
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Security Fix(es): * firefox: thunderbird: Privilege escalation in Firefox Updater (CVE-2025-2817) * firefox: thunderbird: Unsafe attribute access during XPath parsing (CVE-2025-4087) * firefox: thunderbird: Process isolation bypass using "javascript:" URI links in cross-origin frames (CVE-2025-4083) * firefox: thunderbird: Memory safety bugs fixed in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10 (CVE-2025-4091) * firefox: thunderbird: Memory safety bug fixed in Firefox ESR 128.10 and Thunderbird 128.10 (CVE-2025-4093) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. Security Fix(es): * firefox: thunderbird: Privilege escalation in Firefox Updater (CVE-2025-2817) * firefox: thunderbird: Unsafe attribute access during XPath parsing (CVE-2025-4087) * firefox: thunderbird: Process isolation bypass using "javascript:" URI links in cross-origin frames (CVE-2025-4083) * firefox: thunderbird: Memory safety bugs fixed in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10 (CVE-2025-4091) * firefox: thunderbird: Memory safety bug fixed in Firefox ESR 128.10 and Thunderbird 128.10 (CVE-2025-4093) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
05 / REFERENCES
Further evidence
- https://access.redhat.com/errata/RHSA-2025:7428
- https://access.redhat.com/security/cve/CVE-2025-2817
- https://access.redhat.com/security/cve/CVE-2025-4083
- https://access.redhat.com/security/cve/CVE-2025-4087
- https://access.redhat.com/security/cve/CVE-2025-4091
- https://access.redhat.com/security/cve/CVE-2025-4093
- https://bugzilla.redhat.com/2362902
- https://bugzilla.redhat.com/2362904
- https://bugzilla.redhat.com/2362907
- https://bugzilla.redhat.com/2362912
- https://bugzilla.redhat.com/2362915
- https://errata.almalinux.org/9/ALSA-2025-7428.html