CVE-2025-3523 Affecting thunderbird-debugsource package, versions <0:128.10.0-1.el9_5


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.05% (14th percentile)

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  • Snyk IDSNYK-ROCKY9-THUNDERBIRDDEBUGSOURCE-11327432
  • published30 Jul 2025
  • disclosed15 Apr 2025

Introduced: 15 Apr 2025

CVE-2025-3523  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 thunderbird-debugsource to version 0:128.10.0-1.el9_5 or higher.
This issue was patched in RLSA-2025:7435.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird-debugsource package and not the thunderbird-debugsource package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

When an email contains multiple attachments with external links via the X-Mozilla-External-Attachment-URL header, only the last link is shown when hovering over any attachment. Although the correct link is used on click, the misleading hover text could trick users into downloading content from untrusted sources. This vulnerability affects Thunderbird < 137.0.2 and Thunderbird < 128.9.2.

CVSS Base Scores

version 3.1