Vulnerability · Published Apr 29, 2026 · Assigned by Fluid Attacks

CVE-2026-40229Helpy 2.8.0 - Stored XSS in post author display via PostsHelper

Medium 5.1

In plain English

A medium-severity cross-site scripting in helpy from helpyio. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).

Severity (CVSS 4.0)5.1Medium

Exploit odds (30 days)0.2%top 92.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
helpyio	helpy	2.8.0

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

References

https://fluidattacks.com/es/advisories/offspring third-party-advisory
https://github.com/helpyio/helpy product