https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-04T12:51:14.547959+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2021-21377 CVE-2021-21377 — Open Redirect in OMERO.web 2026-10-04T12:51:14.584637+00:00

Affected: omero-web

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.

 https://cve.radiocsirt.org/vuln/ghsa-g4rf-pc26-6hmr GHSA-g4rf-pc26-6hmr — OMERO webclient does not validate URL redirects on login or switching group. 2026-10-04T12:51:14.584711+00:00

Affected: PyPI: omero-web

### Background OMERO.web 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.

### Impact OMERO.web before 5.9.0

### Patches 5.9.0

### Workarounds No workaround

### References

### For more information If you have any questions or comments about this advisory: * Open an issue in [omero-web](https://github.com/ome/omero-web) * Email us at [security](mailto:security@openmicroscopy.org.uk)