CVE-2026-39728 WordPress Instapage Plugin plugin <= 3.7.2 - Server Side Request Forgery (SSRF) vulnerability
Unauthenticated attackers can exploit SSRF in the Instapage WordPress plugin to access internal resources or bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-39728?
CVE-2026-39728 is a high-severity server-side request forgery vulnerability in instapagedev Instapage Plugin, published on 6 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Unauthenticated Server Side Request Forgery (SSRF) in Instapage Plugin <= 3.7.2 versions.
Weakness: CWE-918
Which versions are affected by CVE-2026-39728?
How do I fix CVE-2026-39728?
No fix has been published for CVE-2026-39728 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-39728 being exploited?
There is no known exploitation of CVE-2026-39728 in the wild and no public exploit code.
Sources
Also known as GHSA-f9x9-mxcq-hx6w.