Vulnerability CVE-2021-21377
Published: 2021-03-23

Description:
OMERO.web is open source Django-based software for managing microscopy imaging. OMERO.web before version 5.9.0 supports redirection to a given URL after performing login or switching the group context. These URLs are not validated, allowing redirection to untrusted sites. OMERO.web 5.9.0 adds URL validation before redirecting. External URLs are not considered valid, unless specified in the omero.web.redirect_allowed_hosts setting.

Type:

CWE-601

 (URL Redirection to Untrusted Site ('Open Redirect'))

CVSS2 => (AV:N/AC:M/Au:S/C:P/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.9/10
4.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
None
Affected software
Openmicroscopy -> Omero.web 

 References:
https://github.com/ome/omero-web/blob/master/CHANGELOG.md#590-march-2021
https://github.com/ome/omero-web/commit/952f8e5d28532fbb14fb665982211329d137908c
https://github.com/ome/omero-web/security/advisories/GHSA-g4rf-pc26-6hmr
https://pypi.org/project/omero-web/
https://www.openmicroscopy.org/security/advisories/2021-SV2/
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