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Back to active CVEs
High · CVSS 8.6CVE-2026-78077

Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in MegaMenu Layout Container & Embed Inputs in Helix Ultimate < 2.2.10CVE-2026-78077

Answer in brief

CVE-2026-78077 records a High severity (CVSS 8.6) vulnerability in Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in MegaMenu Layout Container & Embed Inputs in Helix Ultimate < 2.2.10. The current sources do not mark it as known exploited. The current feed maps joomshaper.com/Helix Ultimate extension for Joomla (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 31, 2026Updated Sep 1, 2026Source checked Oct 15, 2026First seen by HOL Aug 31, 2026Material review Sep 1, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.6
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps joomshaper.com/Helix Ultimate extension for Joomla (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
joomshaper.com/Helix Ultimate extension for Joomlageneric1.0-2.2.9Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for joomshaper.com/Helix Ultimate extension for Joomla.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Aug 31, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 31, 2026

Sources and claim methodology

  • Source referencejoomshaper.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • WordPress XStore theme < 9.7.9 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • CISA ADP VulnrichmentAlso CWE-79
  • CISA ADP VulnrichmentAlso CWE-79
  • Helium: Stored XSS via Unrestricted SVG File Upload — Authenticated Users Can Store Executable ScriptsAlso CWE-79
  • Lychee: Stored XSS via Markdown javascript: Links in Photo and Album Descriptions (Gallery View)Also CWE-79
  • Nexus Repository 3 - Stored Cross-Site Scripting in Browse UIAlso CWE-79

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 15, 2026
References
1 linked source
Open source record