CVE-2026-57829Public exploitNetwork attack vector

Unauthenticated stored XSS via mega menu settings

Published Jul 13, 2026 · Updated Jul 13, 2026

Stored XSS in JoomShaper Helix Ultimate 1.0 through 2.2.6 allows remote attackers to inject scripts through a Joomla AJAX request. The onAjaxHelixultimate handler dispatches unauthenticated requests to saveMegaMenuSettings, which stores an unfiltered customclass value that the menu override inserts into an HTML attribute without escaping. The attack requires a victim to load an affected menu, where the script executes in the site's origin and can perform session-bound actions.

CVSS severity8.7
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in JoomShaper Helix Ultimate 1.0 through 2.2.6 allows remote attackers to inject scripts through a Joomla AJAX request. The onAjaxHelixultimate handler dispatches unauthenticated requests to saveMegaMenuSettings, which stores an unfiltered customclass value that the menu override inserts into an HTML attribute without escaping. The attack requires a victim to load an affected menu, where the script executes in the site's origin and can perform session-bound actions.

The record

CVE
CVE-2026-57829
Published
Jul 13, 2026
Updated
Jul 13, 2026
Vendor
JoomShaper
Product
Helix Ultimate
Classifications
CWE-79, CAPEC-18, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0-2.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JoomShaper · Helix Ultimateversion=1.0-2.2.6

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
8.7Joomla! ProjectCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-18XSS Targeting Non-Script Elements
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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