Tribulant Newsletters plugin: SQL injection
Summary
The WordPress Newsletters plugin (newsletters-lite) by Tribulant Software contains an SQL injection vulnerability in versions up to 4.18.1. An attacker can send crafted requests to the website to read, modify or delete data in the database, including user accounts and private data. The CVSS vector assumes no authentication is required, but this is not fully confirmed, because the vendor changelog describes an administrator-only SQL injection in version 4.18.1.
Affected
- Newsletters WordPress plugin (newsletters-lite), versions up to and including 4.18.1 according to Patchstack and the CNA
- Version ranges in the vendor changelog and VulDB differ; verify the installed version
Fixed in
- Version 4.18.2 is the patched version according to Patchstack; update to 4.18.2 or later
- The vendor has not explicitly confirmed that 4.18.2 fixes this exact flaw
Workaround
Unknown. No vendor workaround found. Patchstack provides a mitigation rule that blocks attacks until the update is applied. A web application firewall or virtual patch may help, but its effectiveness against this flaw is unverified.
Exploitation
- Not listed in CISA KEV; CISA SSVC data lists exploitation as none and automatable as yes
- No public proof of concept found
- Patchstack expects exploitation, but this is a forecast, not an observed event
Our recommendation
- Check whether the plugin is installed and which version runs; update to 4.18.2 or later immediately
- If an update is not possible, ask the hosting provider or web developer for help and consider a WAF or the Patchstack mitigation rule
- Review user and subscriber tables for unexpected changes
- Monitor web server logs for suspicious requests
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory (CVE-2026-111402) patchstack.com
- WordPress.org plugin page (Newsletters Lite changelog) wordpress.org
- OpenCVE entry CVE-2026-111402 app.opencve.io
- VulDB entry 426082 vuldb.com
- PSIRT CVE-2026-111402 psirt.com
- ThreatInt CVE-2026-111402 cve.threatint.com
- The Hacker Wire CVE-2026-111402 www.thehackerwire.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 00:45.
Original description (NVD)
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Tribulant Software Newsletters newsletters-lite allows SQL Injection.This issue affects Newsletters: from n/a through 4.18.1.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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