CVE-2025-1015

MEDIUM 5.4

Unsanitized address book fields

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

The Thunderbird Address Book URI fields contained unsanitized links. This could be used by an attacker to create and export an address book containing a malicious payload in a field. For example, in the “Other” field of the Instant Messaging section. If another user imported the address book, clicking on the link could result in opening a web page inside Thunderbird, and that page could execute (unprivileged) JavaScript. This vulnerability was fixed in Thunderbird 128.7 and Thunderbird 135.

Vendor	mozilla
Product	thunderbird
Ecosystems	Browser JavaScript
Industries	Technology
Published	Feb 4, 2025
Last Updated	Apr 13, 2026

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Affected Versions

Mozilla / Thunderbird

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=1939458 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-10/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-11/

Credits

r3m0t3nu11