User Interface (UI) Misrepresentation of Critical Information Affecting thunderbird package, versions [,128.11.1)[130.0b3,139.0.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-THUNDERBIRD-10380740
- published18 Jun 2025
- disclosed10 Jun 2025
- creditDario Weißer
Introduced: 10 Jun 2025
CVE-2025-5986 (opens in a new tab)How to fix?
Upgrade thunderbird to version 128.11.1, 139.0.2 or higher.
Overview
Affected versions of this package are vulnerable to User Interface (UI) Misrepresentation of Critical Information via the mailbox:/// link handling process. An attacker can cause unsolicited file downloads, exhaust disk space by filling it with arbitrary data, or leak credentials by triggering SMB links when a crafted HTML email is viewed in HTML mode. This is only exploitable if the user views the malicious email in HTML mode and interacts with visually obfuscated download triggers.