CVE-2021-21376

Name: CVE-2021-21376
Creator: NVD / NIST
Published: 2021-03-23T16:15:14.173+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.46%

Last modified Jun 17, 2026

CVE-2021-21376 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 1.46% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.46%

70.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Openmicroscopy	Omero.Web	< 5.9.0

References

https://github.com/ome/omero-web/blob/master/CHANGELOG.md#590-march-2021Release Notes, Third Party Advisory
https://github.com/ome/omero-web/commit/952f8e5d28532fbb14fb665982211329d137908cPatch, Third Party Advisory
https://github.com/ome/omero-web/security/advisories/GHSA-gfp2-w5jm-955qThird Party Advisory
https://pypi.org/project/omero-web/Release Notes, Third Party Advisory
https://www.openmicroscopy.org/security/advisories/2021-SV1/Vendor Advisory
https://github.com/ome/omero-web/blob/master/CHANGELOG.md#590-march-2021Release Notes, Third Party Advisory
https://github.com/ome/omero-web/commit/952f8e5d28532fbb14fb665982211329d137908cPatch, Third Party Advisory
https://github.com/ome/omero-web/security/advisories/GHSA-gfp2-w5jm-955qThird Party Advisory
https://pypi.org/project/omero-web/Release Notes, Third Party Advisory
https://www.openmicroscopy.org/security/advisories/2021-SV1/Vendor Advisory

Timeline

Published: Mar 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21376?

How severe is CVE-2021-21376?

CVE-2021-21376 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.46% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21376?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21376?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST