CVE-2026-77028 Joomla Extension - yootheme.com - Reflected XSS and open redirect via the submission redirect parameter in Zoo < 4.1.66
Attackers can execute arbitrary scripts or redirect users via the submission redirect parameter in the Zoo extension for Joomla.
- 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-2026-77028?
CVE-2026-77028 is a medium-severity cross-site scripting vulnerability in yootheme.com Zoo extension for Joomla, published on 21 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 - yootheme.com - Reflected XSS and open redirect via the submission redirect parameter in Zoo < 4.1.66
Which versions are affected by CVE-2026-77028?
How do I fix CVE-2026-77028?
No fix has been published for CVE-2026-77028 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-77028 being exploited?
There is no known exploitation of CVE-2026-77028 in the wild and no public exploit code.
Sources
Also known as GHSA-84gv-j7pq-p96w.