What is CVE-2021-41132?

CVE-2021-41132 is a critical-severity vulnerability in Ome Omero-Web, classified under Improper Encoding or Escaping of Output. CVSS score: 9.8/10. Published 2021-10-14.

How severe is CVE-2021-41132?

Critical severity. CVSS v3 base score is 9.8 out of 10.

XSS in Ome Omero-Web

CVE-2021-41132

OMERO.web provides a web based client and plugin infrastructure. In versions prior to 5.11.0, a variety of templates do not perform proper sanitization through HTML escaping. Due to the lack of sanitization and use of ``jQuery.html()``, there are a whole host of cross-site scripting possibilities with specially crafted input to a variety of fields. This issue is patched in version 5.11.0. There are no known workarounds aside from upgrading.

Published 2021-10-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Weakness classification (CWE)

References

github.com/ome/omero-web/security/advisories/GHSA-g67g-hvc3-xmvf (Third Party Advisory)
github.com/ome/omero-web/commit/0168067accde5e635341b3c714b1d53ae92ba424 (Patch, Third Party Advisory)
www.openmicroscopy.org/security/advisories/2021-SV3/ (Vendor Advisory)

Frequently asked questions

What is CVE-2021-41132?: CVE-2021-41132 is a critical-severity vulnerability in Ome Omero-Web, classified under Improper Encoding or Escaping of Output. CVSS score: 9.8/10. Published 2021-10-14.
How severe is CVE-2021-41132?: Critical severity. CVSS v3 base score is 9.8 out of 10.