CVE-2025-3523

Name
CVE-2025-3523
Description
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security@mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1958385
security@mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-26/
security@mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-27/

Match rules

CPE URI Source package Min version Max version
thunderbird >= unspecified < 137.0.2
thunderbird >= unspecified < 128.9.2
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* thunderbird >= None < 128.9.2
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* thunderbird >= 129.0 < 137.0.2

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
thunderbird edge-community 128.5.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
thunderbird edge-community 128.5.2-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
thunderbird edge-community 128.6.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
thunderbird edge-community 128.7.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
thunderbird edge-community 128.7.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
thunderbird edge-community 128.8.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
thunderbird edge-community 137.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
thunderbird edge-community 137.0.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
thunderbird 3.22-community 128.11.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable