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
• Email us at security

References

• GHSA-g4rf-pc26-6hmr
• ome/omero-web@952f8e5
• https://github.com/ome/omero-web/blob/master/CHANGELOG.md#590-march-2021
• https://pypi.org/project/omero-web/
• https://www.openmicroscopy.org/security/advisories/2021-SV2/
• https://nvd.nist.gov/vuln/detail/CVE-2021-21377