What is CVE-2026-40229?

CVE-2026-40229 is a medium-severity vulnerability in Helpy.io Helpy, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-29.

How severe is CVE-2026-40229?

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

XSS in Helpy.io Helpy

CVE-2026-40229

Helpy contains a stored cross-site scripting vulnerability in the post author display logic. Any registered user can persist arbitrary HTML in their account name field and cause it to be rendered unescaped in public forum threads where the…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (10.3th percentile) — read the EPSS interpretation.

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.

Affected products

Helpy.io Helpy — versions 2.8.0
Helpyio Helpy — versions 2.8.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

help@fluidattacks.com (Exploit, Third Party Advisory, third-party-advisory)
help@fluidattacks.com (Product, product)

Frequently asked questions

What is CVE-2026-40229?: CVE-2026-40229 is a medium-severity vulnerability in Helpy.io Helpy, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-29.
How severe is CVE-2026-40229?: Medium severity. CVSS v3 base score is 5.4 out of 10.