CVE-2026-78079 Joomla Extension - joomshaper.com - Privileged File Upload Bypass via Content Spoofing in Helix Ultimate < 2.2.10
Attackers can redirect users to malicious sites via unvalidated Base64 return parameters in the Helix Ultimate Joomla extension.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-78079?
CVE-2026-78079 is a medium-severity vulnerability in joomshaper.com Helix Ultimate extension for Joomla, published on 31 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Joomla Extension - joomshaper.com - Open Redirect via Base64 Return Parameter in Helix Ultimate < 2.2.10 - Return redirect parameters accepted arbitrary Base64 strings without verifying whether the resolved target was an internal site URL via Uri::isInternal.
Weakness: CWE-601
Which versions are affected by CVE-2026-78079?
How do I fix CVE-2026-78079?
No fix has been published for CVE-2026-78079 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-78079 being exploited?
There is no known exploitation of CVE-2026-78079 in the wild and no public exploit code.
Sources
Also known as GHSA-hvrr-jrcj-qqp5.