The following data is constructed from data provided by Red Hat's json file at:
https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_6195.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-2023:6195-01
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2023:6195
Issue date:         2023-10-30
Revision:           01
CVE Names:          CVE-2023-5721
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Summary: 
An update for thunderbird is now available for Red Hat Enterprise Linux 8.6 Extended Update Support.
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.
This update upgrades Thunderbird to version 115.4.1.
Security Fix(es):
* Mozilla: Queued up rendering could have allowed websites to clickjack (CVE-2023-5721)
* Mozilla: Memory safety bugs fixed in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4 (CVE-2023-5730)
* libvpx: crash related to VP9 encoding in libvpx (CVE-2023-44488)
* Mozilla: Large WebGL draw could have led to a crash (CVE-2023-5724)
* Mozilla: WebExtensions could open arbitrary URLs (CVE-2023-5725)
* Mozilla: Improper object tracking during GC in the JavaScript engine could have led to a crash. (CVE-2023-5728)
* Mozilla: Address bar spoofing via bidirectional characters (CVE-2023-5732)
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-2023-5721
References:
https://access.redhat.com/security/updates/classification/#important