What is CVE-2023-0439?

CVE-2023-0439 is a medium-severity vulnerability in Basixonline Nex-Forms, classified under CWE-79 CROSS-SITE SCRIPTING (XSS). CVSS score: 5.4/10. Published 2023-07-17.

How severe is CVE-2023-0439?

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

Is CVE-2023-0439 known to be exploited?

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

Vulnerability in Basixonline Nex-Forms

CVE-2023-0439

The NEX-Forms WordPress plugin before 8.4.4 does not escape its form name, which could lead to Stored Cross-Site Scripting issues. By default only SuperAdmins (in multisite) / admins (in single site) can create forms, however there is a settings allowing them to give lower roles access to such feature.

Published 2023-07-17 · 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: 0.004 (28.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Basixonline Nex-Forms
Nex-Forms — versions 0

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/04cea9aa-b21c-49f8-836b-2d312253e09a (technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2023-0439?: CVE-2023-0439 is a medium-severity vulnerability in Basixonline Nex-Forms, classified under CWE-79 CROSS-SITE SCRIPTING (XSS). CVSS score: 5.4/10. Published 2023-07-17.
How severe is CVE-2023-0439?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2023-0439 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.