CVE-2026-66494 Joomla Extension - joomshaper.com - Unauthenticated stored XSS in Shapes API endpoint SP Page Builder < 6.7.0
Unauthenticated attackers can inject malicious JavaScript into the SP Page Builder editor, which executes when an administrator views the page.
- 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-2026-66494?
CVE-2026-66494 is a high-severity cross-site scripting vulnerability in joomshaper.com SP Page Builder extension for Joomla, published on 7 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 - Unauthenticated stored XSS in Shapes API endpoint SP Page Builder < 6.7.0 - An unauthenticated attacker can store malicious JavaScript in a Joomla site's database via a single HTTP request. When an administrator opens the SP Page Builder editor, the JavaScript executes in their browser automatically..
Which versions are affected by CVE-2026-66494?
How do I fix CVE-2026-66494?
No fix has been published for CVE-2026-66494 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-2026-66494 being exploited?
There is no known exploitation of CVE-2026-66494 in the wild and no public exploit code.
Sources
Also known as GHSA-vcvg-2gmm-mmpg.