CVE-2021-21377
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://github.com/ome/omero-web/security/advisories/GHSA-g4rf-pc26-6hmr
- https://nvd.nist.gov/vuln/detail/CVE-2021-21377
- https://github.com/ome/omero-web/commit/952f8e5d28532fbb14fb665982211329d137908c
- https://github.com/ome/omero-web
- https://github.com/ome/omero-web/blob/master/CHANGELOG.md#590-march-2021
- https://github.com/pypa/advisory-database/tree/main/vulns/omero-web/PYSEC-2021-32.yaml
- https://pypi.org/project/omero-web
- https://www.openmicroscopy.org/security/advisories/2021-SV2
- https://pypi.org/project/omero-web/
- https://www.openmicroscopy.org/security/advisories/2021-SV2/
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.