CVE-2021-21376 json
Information Exposure in OMERO.web
published 2021-03-23 5 y ago modified 2026-09-10 1 mo ago also GHSA-gfp2-w5jm-955q , PYSEC-2021-31 , EUVD-2021-0157
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 73%
- public exploits
- 0
- none known
Summary
OMERO.web is open source Django-based software for managing microscopy imaging. OMERO.web before version 5.9.0 loads various information about the current user such as their id, name and the groups they are in, and these are available on the main webclient pages. This represents an information exposure vulnerability. Some additional information being loaded is not used by the webclient and is being removed in this release. This is fixed in version 5.9.0.
Patch / fix
Exploit prediction
1.46% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
| GitHub | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | omero-web | <5.9.0 |
5.9.0 |
Affected products
- ome omero-web
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
github.com
/ome/omero-web/commit/952f8e5d28532fbb14fb665982211329d137908c
web, patch, third-party-advisory
-
openmicroscopy.org
/security/advisories/2021-SV1/
vendor-advisory, advisory
-
github.com
/ome/omero-web/security/advisories/GHSA-gfp2-w5jm-955q
web, third-party-advisory, advisory
-
pypi.org
/project/omero-web/
release-notes, third-party-advisory, package
-
github.com
/ome/omero-web/blob/master/CHANGELOG.md#590-march-2021
web, release-notes, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-21376
advisory
-
github.com
/ome/omero-web
package
-
github.com
/pypa/advisory-database/tree/main/vulns/omero-web/PYSEC-2021-31.yaml
web
-
pypi.org
/project/omero-web
web
-
openmicroscopy.org
/security/advisories/2021-SV1
web
Sources
- CVE List CVE-2021-21376
- GitHub Advisory GHSA-gfp2-w5jm-955q
- NVD CVE-2021-21376
- OSV PYSEC-2021-31
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.