CVE-2021-39220CWE-20CWE-200

Bypass of image blocking in Nextcloud Mail

Low · published October 25, 2021

CVSS v3.1
3.5
EPSS
1%
Percentile
59.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.5 · LOW
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00910 · 59.6th percentile
Weaknesses
CWE-20 · Improper Input Validation; CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2021-10-25T18:55Z
EPSS history
Timeline
  • 25 OCT 18:55Z
    Bypass of image blocking in Nextcloud Mail
    cvelistv5