How severe is CVE-2021-40272?

CVE-2021-40272 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-40272 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40272?

CVE-2021-40272 affects Op5 Monitor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40272?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-40272 published?

CVE-2021-40272 was published on 2022-11-14 and last updated on 2026-06-17.

CVE-2021-40272

CVE-2021-40272 is a medium-severity vulnerability in Op5 Monitor with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Op5 Monitor
Published: 2022-11-14
Last modified: 2026-06-17

Description

OP5 Monitor 8.3.1, 8.3.2, and OP5 8.3.3 are vulnerable to Cross Site Scripting (XSS).

Frequently asked questions

What is CVE-2021-40272?: OP5 Monitor 8.3.1, 8.3.2, and OP5 8.3.3 are vulnerable to Cross Site Scripting (XSS).
How severe is CVE-2021-40272?: CVE-2021-40272 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-40272 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40272?: CVE-2021-40272 affects Op5 Monitor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40272?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40272 published?: CVE-2021-40272 was published on 2022-11-14 and last updated on 2026-06-17.

References

https://github.com/hosakauk/exploits/blob/master/itrs_op5_monitor_xss.pdf

Affected products (1)

cpe:2.3:a:op5:monitor:*:*:*:*:*:*:*:*

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