CVE-2026-57829

MEDIUM

Joomla Extension - joomshaper.com - Unauthenticated stored XSS in Helix Ultimate < 2.2.7

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-57829. PoCs published by Is4yev.

AI-analyzed exploit summary This repository contains a functional proof-of-concept exploit for CVE-2026-57829, an unauthenticated stored XSS vulnerability in the JoomShaper Helix Ultimate Framework (plg_system_helixultimate <= 2.2.6). The exploit demonstrates how an attacker can inject malicious JavaScript into a menu item's custom class, which is then rendered unescaped on every page for all visitors, leading to potential admin session-riding and account takeover.

Description

Joomla Extension - joomshaper.com - Unauthenticated stored XSS in Helix Ultimate < 2.2.7 - The Joomla extension Helix Ultimate is vulnerable to an unauthenticated stored XSS.

Exploits (1)

github WORKING POC 1 stars
by Is4yev · pythonpoc
https://github.com/Is4yev/CVE-2026-57829

This repository contains a functional proof-of-concept exploit for CVE-2026-57829, an unauthenticated stored XSS vulnerability in the JoomShaper Helix Ultimate Framework (plg_system_helixultimate <= 2.2.6). The exploit demonstrates how an attacker can inject malicious JavaScript into a menu item's custom class, which is then rendered unescaped on every page for all visitors, leading to potential admin session-riding and account takeover.

Classification
Working Poc 99%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: JoomShaper Helix Ultimate Framework (plg_system_helixultimate <= 2.2.6)
No auth needed
Prerequisites: Target must have the Helix Ultimate Framework plugin (plg_system_helixultimate) enabled and version <= 2.2.6 · Target must use a Helix-Ultimate-based template with the vulnerable mod_menu override · A menu item ID must be accessible (auto-discovered or provided)
mistral-large-3 · analyzed Jul 13, 2026 Full analysis →

References (1)

Core 1

Scores

CVSS v3 6.1
EPSS 0.0018
EPSS Percentile 8.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-79
Status published
Products (2)
joomshaper.com/Helix Ultimate extension for Joomla 1.0-2.2.6
ollyo/helix_ultimate 1.0 - 2.2.6
Published Jul 13, 2026
Tracked Since Jul 13, 2026