CVE-2021-39220 — Bypass of image blocking in Nextcloud Mail
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 …
Published: 2021-10-25 · CVSS: 3.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7