Skip to content
OpenAdvisories
Low · 3.5 CVE-2021-39220 EUVD-2021-25593

Bypass of image blocking in Nextcloud Mail

Published Oct 25, 2021 · Updated Aug 4, 2024 · Assigned by GitHub_M

Description

Nextcloud is an open-source, self-hosted productivity platform The Nextcloud Mail application prior to versions 1.10.4 and 1.11.0 does by default not render images in emails to not leak the read state or user IP. The privacy filter failed to filter images with a relative protocol. It is recommended that the Nextcloud Mail application is upgraded to 1.10.4 or 1.11.0. There are no known workarounds aside from upgrading.

Affected products

VendorProductAffectedFixed
nextcloud security-advisories < 1.10.4, < 1.11.0 —

References