External Control of Assumed-Immutable Web Parameter
CVE-2021-27770
Summary
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.
- LOW
- NETWORK
- LOW
- UNCHANGED
- REQUIRED
- LOW
- HIGH
- LOW
CWE-472 - External Control of Assumed-Immutable Web Parameter
The web application does not sufficiently verify inputs that are assumed to be immutable but are actually externally controllable, such as hidden form fields.
References
Advisory Timeline
- Published
