How severe is CVE-2025-39400?

CVE-2025-39400 has a CVSS 3.x base score of 7.1, rated high 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 low.

Is CVE-2025-39400 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-39400?

CVE-2025-39400 primarily affects Wpeverest User Registration & Membership. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-39400?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-39400 have an EU (EUVD) identifier?

Yes. CVE-2025-39400 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12078.

When was CVE-2025-39400 published?

CVE-2025-39400 was published on 2025-04-24 and last updated on 2026-06-17.

CVE-2025-39400

CVE-2025-39400 is a high-severity vulnerability in Wpeverest User Registration & Membership with a CVSS 3.x base score of 7.1. 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: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-12078
Weakness: CWE-79
Affected product: Wpeverest User Registration & Membership
Published: 2025-04-24
Last modified: 2026-06-17

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in wpeverest User Registration user-registration allows Reflected XSS.This issue affects User Registration: from n/a through < 4.2.0.

Frequently asked questions

What is CVE-2025-39400?: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in wpeverest User Registration user-registration allows Reflected XSS.This issue affects User Registration: from n/a through < 4.2.0.
How severe is CVE-2025-39400?: CVE-2025-39400 has a CVSS 3.x base score of 7.1, rated high 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 low.
Is CVE-2025-39400 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-39400?: CVE-2025-39400 primarily affects Wpeverest User Registration & Membership. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-39400?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-39400 have an EU (EUVD) identifier?: Yes. CVE-2025-39400 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12078.
When was CVE-2025-39400 published?: CVE-2025-39400 was published on 2025-04-24 and last updated on 2026-06-17.

References

https://patchstack.com/database/Wordpress/Plugin/user-registration/vulnerability/wordpress-user-registration-plugin-4-2-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

Affected products (2)

cpe:2.3:a:wpeverest:user_registration_\&_membership:*:*:*:*:free:wordpress:*:*
cpe:2.3:a:wpeverest:user_registration_\&_membership:*:*:*:*:pro:wordpress:*:*

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