CVE-2026-12978 FunnelKit < 3.15.0.6 - Reflected XSS via Divi Optin Form
Unauthenticated attackers can execute arbitrary scripts in logged-in users' browsers via a crafted link, potentially leading to account takeover.
- 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-2026-12978?
CVE-2026-12978 is a high-severity cross-site scripting vulnerability in Unknown FunnelKit, published on 16 Jul 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
The FunnelKit WordPress plugin before 3.15.0.6 does not escape a user-supplied parameter before reflecting it into the HTML response of one of its page-builder AJAX actions, allowing unauthenticated attackers to perform Reflected Cross-Site Scripting against logged-in users who open a crafted page. The affected action is only registered when the Divi /builder is active.
Weakness: CWE-79
Which versions are affected by CVE-2026-12978?
How do I fix CVE-2026-12978?
No fix has been published for CVE-2026-12978 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-2026-12978 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12978 exists.
Sources
Also known as GHSA-j8mc-rrx2-537q.