CVE-2018-12372

thunderbird: S/MIME and PGP decryption oracles can be built with HTML emails

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Severity

Important

Red Hat Product Security

6.5

CVSS 3.0

Review impact separately from score.

Published · July 4, 2018

Updated · January 9, 2026

Description

Decrypted S/MIME parts, when included in HTML crafted for an attack, can leak plaintext when included in a a HTML reply/forward. This vulnerability affects Thunderbird < 52.9.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 6.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CWE-201 · Insertion of Sensitive Information Into Sent Data