What is CVE-2026-80437?

CVE-2026-80437 is a medium-severity vulnerability in Ninja Forms, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 4.8/10. Published 2026-09-06.

How severe is CVE-2026-80437?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Vulnerability in Ninja Forms

CVE-2026-80437

The Ninja Forms WordPress plugin from 3.14.10 before 3.15.2 does not prevent shortcodes in request-derived values from being executed when it substitutes them into content it later processes for shortcodes, allowing unauthenticated users to run any shortcode registered on the site.

Published 2026-09-06 · last modified 2026-09-08.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (14.5th percentile), scored 2026-10-21.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Ninja Forms

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

wpscan.com/vulnerability/473a3321-7dc6-454a-82f4-89b6a393d09a/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-80437?: CVE-2026-80437 is a medium-severity vulnerability in Ninja Forms, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 4.8/10. Published 2026-09-06.
How severe is CVE-2026-80437?: Medium severity. CVSS v3 base score is 4.8 out of 10.