VULNERABILITY INTELLIGENCE

CVE-2021-27770

CVSS score6.8 MEDIUM
EPSS probability0.74%
CISA KEVNot currently listed
Published2022-05-12
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L

Description

The vulnerability was discovered within the “FaviconService”. The service takes a base64-encoded URL which is then requested by the webserver. We assume this service is used by the “meetings”-function where users can specify an external URL where the online meeting will take place.

Weakness classification

  • CWE-472: External Control of Assumed-Immutable Web Parameter

Primary references