Unauthenticated mail relay via unrestricted recipient routing
Published Aug 6, 2026 · Updated Aug 6, 2026
Improper authentication in Estatik Real Estate Plugin before 4.3.3 allows remote attackers to relay email to arbitrary recipients. The public request-form handler accepts a page nonce while allowing the anti-spam field to be omitted and recipient_type=-1 to route attacker-controlled subject, body, and Reply-To fields to supplied addresses. A public page rendering the request-form shortcode is required; no account or other non-default configuration is needed, enabling spam or phishing through the site mailer.
Summary
What happened
Improper authentication in Estatik Real Estate Plugin before 4.3.3 allows remote attackers to relay email to arbitrary recipients. The public request-form handler accepts a page nonce while allowing the anti-spam field to be omitted and recipient_type=-1 to route attacker-controlled subject, body, and Reply-To fields to supplied addresses. A public page rendering the request-form shortcode is required; no account or other non-default configuration is needed, enabling spam or phishing through the site mailer.
The record
- CVE
- CVE-2026-14547
- Published
- Aug 6, 2026
- Updated
- Aug 6, 2026
- Vendor
- Estatik Inc.
- Product
- Estatik Real Estate Plugin
- Classifications
- CWE-287, T1566
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 6, 2026CVE publishedPublication date reported by the CVE source.
- Aug 6, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <4.3.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- WPScan unauthenticated arbitrary-recipient relay proof of conceptproof of concept · validated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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