Medium severity4.8NVD Advisory· Published Mar 23, 2021· Updated Jun 17, 2026
CVE-2021-21377
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
omero-webPyPI | < 5.9.0 | 5.9.0 |
Affected products
3Patches
Vulnerability mechanics
References
10- github.com/ome/omero-web/commit/952f8e5d28532fbb14fb665982211329d137908cnvdPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-g4rf-pc26-6hmrghsaADVISORY
- github.com/ome/omero-web/blob/master/CHANGELOG.mdnvdRelease NotesThird Party AdvisoryWEB
- github.com/ome/omero-web/security/advisories/GHSA-g4rf-pc26-6hmrnvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-21377ghsaADVISORY
- pypi.org/project/omero-web/nvdThird Party Advisory
- www.openmicroscopy.org/security/advisories/2021-SV2/nvdVendor Advisory
- github.com/pypa/advisory-database/tree/main/vulns/omero-web/PYSEC-2021-32.yamlghsaWEB
- pypi.org/project/omero-webghsaWEB
- www.openmicroscopy.org/security/advisories/2021-SV2ghsaWEB
News mentions
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