What is CVE-2026-80440?

CVE-2026-80440 is a medium-severity vulnerability in Hustle, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 4.8/10. Published 2026-09-09.

How severe is CVE-2026-80440?

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

Vulnerability in Hustle

CVE-2026-80440

The Hustle WordPress plugin before 7.8.14.2 does not prevent shortcodes in submitted form values from being executed when it substitutes those values into the message it returns after submission, because the guard it applies can be defeated by nesting, allowing unauthenticated users to run any shortcode registered on the site.

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

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 (14.6th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.6% 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

Hustle

Weakness classification (CWE)

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

References

wpscan.com/vulnerability/7b86b462-e021-4906-bbf3-bf83f89a03ee/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-80440?: CVE-2026-80440 is a medium-severity vulnerability in Hustle, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 4.8/10. Published 2026-09-09.
How severe is CVE-2026-80440?: Medium severity. CVSS v3 base score is 4.8 out of 10.