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 they participate, in the admin ticket view, and in HTML notification emails sent to other users.This issue affects helpy: 2.8.0.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
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: 0.003 (15.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.7% 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: 0.003 · change: +0.001
Affected products
- Helpy.io Helpy — versions 2.8.0
- Helpyio Helpy — versions 2.8.0
Weakness classification (CWE)
References
- fluidattacks.com/es/advisories/offspring (Exploit, Third Party Advisory, third-party-advisory)
- github.com/helpyio/helpy (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.