CVE-2020-11880

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-04-17 · updated 2026-06-17

Description

An issue was discovered in KDE KMail before 19.12.3. By using the proprietary (non-RFC6068) "mailto?attach=..." parameter, a website (or other source of mailto links) can make KMail attach local files to a composed email message without showing a warning to the user, as demonstrated by an attach=.bash_history value.

Affected products

KDE Kmail: before 19.12.3 — fixed in 19.12.3

How to fix

Upgrade to a fixed version: KDE Kmail 19.12.3. Check the vendor advisory for mitigations.

References

https://cgit.kde.org/kmail.git/commit/?id=2a348eccd352260f192d9b449492071bbf2b34b1
https://cgit.kde.org/kmail.git/tag/?h=v19.12.3
https://cgit.kde.org/kmail.git/commit/?id=2a348eccd352260f192d9b449492071bbf2b34b1
https://cgit.kde.org/kmail.git/tag/?h=v19.12.3

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