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Fencer Vulns
critical 9.8

CVE-2021-41132 json

Inconsistent input sanitisation leads to XSS vectors

published 2021-10-14 5 y ago modified 2026-07-08 4 mo ago also GHSA-g67g-hvc3-xmvf , PYSEC-2021-372 , PYSEC-2021-379 , EUVD-2021-0156

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi omero-web 5.11.0
  • pypi omero-figure 4.4.1
  • openmicroscopy omero-figure 4.4.1
  • openmicroscopy omero-web 5.11.0

Exploit prediction

1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
pypi omero-web
<5.11.0
5.11.0
pypi omero-figure
<4.4.1
4.4.1

Affected products

  • ome omero-web

Classification

Weakness
  • CWE-116 Improper Encoding or Escaping of Output
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

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.