CVE-2019-10732

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-04-07 · updated 2026-06-17
Weakness: CWE-319

Description

In KDE KMail 5.2.3, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. This modified multipart email can be re-sent by the attacker to the intended receiver. If the receiver replies to this (benign looking) email, they unknowingly leak the plaintext of the encrypted message part(s) back to the attacker.

Affected products

Debian Linux: 8.0
KDE Kmail: 5.2.3

References

https://bugs.kde.org/show_bug.cgi?id=404698
https://lists.debian.org/debian-lts-announce/2019/06/msg00012.html
https://bugs.kde.org/show_bug.cgi?id=404698
https://lists.debian.org/debian-lts-announce/2019/06/msg00012.html

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