Estatik Real Estate Plugin < 4.3.4 - Unauthenticated Arbitrary-Recipient Mail Relay via Signed-Value Mismatch
Priority LOW 17CWE-345Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-345.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00136 3rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Estatik Real Estate Plugin (Unknown): 4.3.4
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Estatik Real Estate Plugin | before 4.3.4 | 4.3.4 | Patch available | CNA |
- Estatik Real Estate Plugin VendorUnknown Affected before 4.3.4 Fixed in 4.3.4 Patch available CNA
Remediation
- Fix · CNA Estatik Real Estate Plugin (Unknown) Fixed in 4.3.4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18044
- 2026-10-03 Alias added: GHSA-xjx9-mjr5-hr38
References
Sources
- CVE-2026-18044 · CVE Program
- CVE-2026-18044 · NVD
- FIRST EPSS
- GHSA-xjx9-mjr5-hr38 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences