SB2025070187 - Red Hat Enterprise Linux 8 update for thunderbird

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Main Vulnerability Database SB2025070187

SB2025070187 - Red Hat Enterprise Linux 8 update for thunderbird

Published: July 1, 2025

Security Bulletin ID SB2025070187
Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Input validation error (CVE-ID: CVE-2025-5986)

The vulnerability allows a remote attacker to gain access to sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when handling mailbox:/// links. A remote attacker can create a specially crafted email mailbox:/// links and trigger unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even if auto-saving is disabled. Additionally, this behavior can be use to leak Windows credentials via SMB links when the email is viewed in HTML mode.

Note, viewing the email in HTML mode is enough to load external content.


Remediation

Install update from vendor's website.

References