CVE-2026-18044 Estatik Real Estate Plugin < 4.3.4 - Unauthenticated Arbitrary-Recipient Mail Relay via Signed-Value Mismatch
Unauthenticated attackers can send arbitrary emails to any recipient via the property request form if a custom address is configured.
- 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-2026-18044?
CVE-2026-18044 is a low-severity vulnerability in Unknown Estatik Real Estate Plugin, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Estatik Real Estate Plugin WordPress plugin before 4.3.4 does not validate the same recipient list that it later uses to address the message sent by its property request form, allowing unauthenticated users to send emails to arbitrary recipients with arbitrary subject, body and Reply-To on sites where the form is configured to route to a custom address.
Weakness: CWE-345
Which versions are affected by CVE-2026-18044?
How do I fix CVE-2026-18044?
No fix has been published for CVE-2026-18044 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18044 being exploited?
There is no known exploitation of CVE-2026-18044 in the wild and no public exploit code.
Sources
Also known as GHSA-xjx9-mjr5-hr38.