How severe is CVE-2021-40374?

CVE-2021-40374 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-40374 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40374?

CVE-2021-40374 affects Apperta Openeye. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40374?

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

When was CVE-2021-40374 published?

CVE-2021-40374 was published on 2022-04-06 and last updated on 2026-06-17.

CVE-2021-40374

CVE-2021-40374 is a medium-severity vulnerability in Apperta Openeye with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Apperta Openeye
Published: 2022-04-06
Last modified: 2026-06-17

Description

A stored cross-site scripting (XSS) vulnerability was identified in Apperta Foundation OpenEyes 3.5.1. Updating a patient's details allows remote attackers to inject arbitrary web script or HTML via the Address1 parameter. This JavaScript then executes when the patient profile is loaded, which could be used in a XSS attack.

Frequently asked questions

What is CVE-2021-40374?: A stored cross-site scripting (XSS) vulnerability was identified in Apperta Foundation OpenEyes 3.5.1. Updating a patient's details allows remote attackers to inject arbitrary web script or HTML via the Address1 parameter. This JavaScript then executes when the patient profile is loaded, which could be used in a XSS attack.
How severe is CVE-2021-40374?: CVE-2021-40374 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-40374 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40374?: CVE-2021-40374 affects Apperta Openeye. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40374?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40374 published?: CVE-2021-40374 was published on 2022-04-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apperta:openeye:3.5.1:*:*:*:*:*:*:*

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