CVE-2020-11879

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.8% 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 GNOME Evolution before 3.35.91. By using the proprietary (non-RFC6068) "mailto?attach=..." parameter, a website (or other source of mailto links) can make Evolution attach local files or directories to a composed email message without showing a warning to the user, as demonstrated by an attach=. value.

Affected products

GNOME Evolution: before 3.35.91 — fixed in 3.35.91

How to fix

Upgrade to a fixed version: GNOME Evolution 3.35.91. Check the vendor advisory for mitigations.

References

https://gitlab.gnome.org/GNOME/evolution/-/blob/master/NEWS
https://gitlab.gnome.org/GNOME/evolution/issues/784
https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mailto-paper.pdf
https://gitlab.gnome.org/GNOME/evolution/-/blob/master/NEWS
https://gitlab.gnome.org/GNOME/evolution/issues/784
https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mailto-paper.pdf

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