High severity · published Aug 31, 2026
CVE-2026-78077
Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in MegaMenu Layout Container & Embed Inputs in Helix Ultimate < 2.2.10
8.6
CVSS
0.4%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HU
Helix Ultimate extension for Joomla · joomshaper.com
1.0-2.2.9 · source: vendor
Affected product
HU
Helix Ultimate extension for Joomla
joomshaper.com
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78077
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78077
www.joomshaper.com
https://www.joomshaper.com/joomla-templates/helixultimate
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