CVE-2019-11755

HIGH
7.5
CVSS Score
Published: September 27, 2019 at 05:10 PM UTC
Updated: June 17, 2026 at 02:13 AM UTC
1 product affected across 1 vendorThunderbird

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

A crafted S/MIME message consisting of an inner encryption layer and an outer SignedData layer was shown as having a valid digital signature, although the signer might have had no access to the contents of the encrypted message, and might have stripped a different signature from the encrypted message. Previous versions had only suppressed showing a digital signature for messages with an outer multipart/signed layer. This vulnerability affects Thunderbird < 68.1.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 68.1.1
Affected range stops below 68.1.1, so it looks safe — our inference, not a vendor statement

References (9)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-347

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