What’s Vulnerable › Vulnerabilities
CVE-2026-18044: Estatik Real Estate Plugin < 4.3.4 - Unauthenticated Arbitrary-Recipient Mail Relay via Signed-Value Mismatch
- Severity: low (CVSS 3.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-12 · updated 2026-08-26
- Weakness: CWE-345
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.
Affected products
- Estatik Real Estate Plugin: before 4.3.4 — fixed in 4.3.4
How to fix
Upgrade to a fixed version: Estatik Real Estate Plugin 4.3.4. Check the vendor advisory for mitigations.
References
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