The following advisory data is extracted from:

https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_12187.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff




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Red Hat Security Advisory

Synopsis:           Important: thunderbird security update
Advisory ID:        RHSA-2025:12187-03
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2025:12187
Issue date:         2025-07-30
Revision:           03
CVE Names:          CVE-2025-8027
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Summary: 

An update for thunderbird is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.




Description:

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

* firefox: thunderbird: Large branch table could lead to truncated instruction (CVE-2025-8028)

* firefox: thunderbird: Memory safety bugs (CVE-2025-8035)

* firefox: thunderbird: Incorrect URL stripping in CSP reports (CVE-2025-8031)

* firefox: thunderbird: JavaScript engine only wrote partial return value to stack (CVE-2025-8027)

* firefox: thunderbird: Potential user-assisted code execution in ?Copy as cURL? command (CVE-2025-8030)

* firefox: Memory safety bugs (CVE-2025-8034)

* firefox: thunderbird: Incorrect JavaScript state machine for generators (CVE-2025-8033)

* firefox: thunderbird: XSLT documents could bypass CSP (CVE-2025-8032)

* firefox: thunderbird: javascript: URLs executed on object and embed tags (CVE-2025-8029)

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.


Solution:

https://access.redhat.com/articles/11258



CVEs:

CVE-2025-8027

References:

https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2382701
https://bugzilla.redhat.com/show_bug.cgi?id=2382703
https://bugzilla.redhat.com/show_bug.cgi?id=2382704
https://bugzilla.redhat.com/show_bug.cgi?id=2382707
https://bugzilla.redhat.com/show_bug.cgi?id=2382710
https://bugzilla.redhat.com/show_bug.cgi?id=2382711
https://bugzilla.redhat.com/show_bug.cgi?id=2382717
https://bugzilla.redhat.com/show_bug.cgi?id=2382718
https://bugzilla.redhat.com/show_bug.cgi?id=2382720