CVE-2018-18513

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-04-26 · updated 2026-06-17
Weakness: CWE-476

Description

A crash can occur when processing a crafted S/MIME message or an XPI package containing a crafted signature. This can be used as a denial-of-service (DOS) attack because Thunderbird reopens the last seen message on restart, triggering the crash again. This vulnerability affects Thunderbird < 60.5.

Affected products

Mozilla Thunderbird: before 60.5.0 — fixed in 60.5.0

How to fix

Upgrade to a fixed version: Mozilla Thunderbird 60.5.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1533300
https://www.mozilla.org/security/advisories/mfsa2019-03/
https://bugzilla.mozilla.org/show_bug.cgi?id=1533300
https://www.mozilla.org/security/advisories/mfsa2019-03/

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