What is CVE-2021-40096?

CVE-2021-40096 is a medium-severity vulnerability in Squaredup, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-12-07.

How severe is CVE-2021-40096?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2021-40096 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Squaredup

CVE-2021-40096

A cross-site scripting (XSS) vulnerability in integration configuration in SquaredUp for SCOM 5.2.1.6654 allows remote attackers to inject arbitrary web script or HTML via modification of the authorisationUrl in some integration configurations.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-12-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Squaredup

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

kaje11/CVEs

References

support.squaredup.com (Vendor Advisory)
support.squaredup.com/hc/en-us/articles/4410656396817-CVE-2021-40096-Stored-cro… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-40096?: CVE-2021-40096 is a medium-severity vulnerability in Squaredup, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-12-07.
How severe is CVE-2021-40096?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2021-40096 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.