Open Redirect in Ome Omero-Web
CVE-2021-21377
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.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (55.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Ome Omero-Web — versions < 5.9.0
- Openmicroscopy Omero.web
Weakness classification (CWE)
References
- pypi.org/project/omero-web/ (Third Party Advisory)
- github.com/ome/omero-web/blob/master/CHANGELOG.md (Third Party Advisory, Release Notes)
- github.com/ome/omero-web/commit/952f8e5d28532fbb14fb665982211329d137908c (Patch, Third Party Advisory)
- github.com/ome/omero-web/security/advisories/GHSA-g4rf-pc26-6hmr (Third Party Advisory)
- www.openmicroscopy.org/security/advisories/2021-SV2/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-21377?
- CVE-2021-21377 is a medium-severity vulnerability in Ome Omero-Web, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.8/10. Published 2021-03-23.
- How severe is CVE-2021-21377?
- Medium severity. CVSS v3 base score is 4.8 out of 10.