EUVD-2026-68524
GHSA-v6p2-jx9w-8967
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
PR:H required to inject; UI:R because victims must browse to the page; S:C and C:L/I:L reflect standard stored-XSS cross-user impact with no availability consequence.
Primary rating from Vendor (Joomla).
CVSS VectorVendor: Joomla
Lifecycle Timeline
2DescriptionCVE.org
Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in MegaMenu Layout Container & Embed Inputs in Helix Ultimate < 2.2.10 - Unsanitized column and item configuration values stored within the MegaMenu layout JSON were rendered without complete contextual escaping, allowing injection of malicious HTML/JS. Stricter sanitization and tag allowlists via InputFilter and htmlspecialchars were implemented.
AnalysisAI
Stored XSS in the Helix Ultimate Joomla extension (versions before 2.2.10) allows authenticated administrators to plant persistent malicious JavaScript through MegaMenu layout configuration fields, which subsequently executes in the browsers of all site visitors who load affected pages. Column and item configuration values within the MegaMenu layout JSON were persisted and rendered without complete contextual escaping, enabling injection of arbitrary HTML and script payloads. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The injection step requires an authenticated Joomla user with high-level backend privileges (PR:H in the CVSS 4.0 vector) sufficient to access and modify the Helix Ultimate MegaMenu layout configuration - typically a Joomla Super User or Administrator role. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.6 reflects the high confidentiality and integrity impact (VC:H/VI:H) achievable once a payload is delivered, but the PR:H metric is the critical moderating factor: an attacker must already hold Joomla administrator-level credentials to reach the MegaMenu configuration interface and inject a payload. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Helix Ultimate to version 2.2.10 or later, which is confirmed by the CVE description as the fixed release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all Joomla installations to identify instances of Helix Ultimate and their current versions. …
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Arbitrary file deletion in JoomShaper's Helix Ultimate template framework for Joomla allows unauthenticated remote attac
Stored cross-site scripting in JoomShaper's Helix Ultimate template framework for Joomla lets unauthenticated attackers
Open redirect in Helix Ultimate (Joomla extension by joomshaper.com) versions prior to 2.2.10 allows unauthenticated net
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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