How severe is CVE-2025-3840?

CVE-2025-3840 has a CVSS 4.0 base score of 2.1, rated low severity.

Is CVE-2025-3840 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-3840?

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

Does CVE-2025-3840 have an EU (EUVD) identifier?

Yes. CVE-2025-3840 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12379.

When was CVE-2025-3840 published?

CVE-2025-3840 was published on 2025-04-21 and last updated on 2026-06-17.

CVE-2025-3840

CVE-2025-3840 is a low-severity vulnerability with a CVSS 4.0 base score of 2.1. 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: Low (CVSS 4.0 base score 2.1)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-12379
Weakness: CWE-79
Published: 2025-04-21
Last modified: 2026-06-17

Description

An improper neutralization of input vulnerability was identified in the End of Life (EOL) OVA based connect installer component which is deployed for installation purposes in a customer network. This EOL component was deprecated in September 2023 with end of support extended till January 2024. An actor can manipulate the action parameter of the login form to inject malicious scripts which would lead to a XSS attack under certain conditions.

Frequently asked questions

What is CVE-2025-3840?: An improper neutralization of input vulnerability was identified in the End of Life (EOL) OVA based connect installer component which is deployed for installation purposes in a customer network. This EOL component was deprecated in September 2023 with end of support extended till January 2024. An actor can manipulate the action parameter of the login form to inject malicious scripts which would lead to a XSS attack under certain conditions.
How severe is CVE-2025-3840?: CVE-2025-3840 has a CVSS 4.0 base score of 2.1, rated low severity.
Is CVE-2025-3840 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-3840?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-3840 have an EU (EUVD) identifier?: Yes. CVE-2025-3840 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12379.
When was CVE-2025-3840 published?: CVE-2025-3840 was published on 2025-04-21 and last updated on 2026-06-17.

References

https://saviynt.com/trust-compliance-security

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