SendPress Newsletters plugin: Unauthenticated SQL injection
Summary
The WordPress plugin SendPress Newsletters up to and including version 1.26.1.20 contains an SQL injection vulnerability that can be triggered without authentication. An attacker can send crafted requests over the network to run blind SQL injection, which may allow reading, modifying or deleting database content, including subscriber and user data. The plugin is only exploitable on sites where it is installed and active and publicly reachable.
Affected
- SendPress Newsletters WordPress plugin, all versions up to and including 1.26.1.20
- Vulnerability type: CWE-89 (SQL Injection), blind
Fixed in
- Unknown. No vendor patch confirmed. Patchstack reports no official patch available.
- VulDB reports 1.26.1.21 or later for a related record (CVE-2026-93855), not verified.
Workaround
- Deactivate and remove the plugin if newsletters are not actively used.
- Place a web application firewall or virtual patch in front of the site; coverage for this CVE is not verified.
- Restrict the database user to the minimum privileges needed.
- Review web server logs for unusual requests to SendPress endpoints.
Exploitation
- Not known exploited. No CISA KEV listing found.
- Public proof of concept: none found.
- Patchstack rates the flaw as high priority and automatable; CISA SSVC shows exploitation: none.
Our recommendation
- Check whether the plugin is installed and active on any WordPress site.
- Disable and remove the plugin if it is not essential; replace it with a maintained alternative if newsletters are needed.
- If it must stay, apply a WAF or virtual patch and review logs for signs of compromise.
- Remove stored subscriber data where it is not needed, and treat the issue as critical for sites handling personal data.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory patchstack.com
- HOL Guard CVE record hol.org
- Strix CVE record www.strix.ai
- OffSeq radar CVE record radar.offseq.com
- WP Hive plugin page wphive.com
- WPScan plugin page wpscan.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, 03:20.
Original description (NVD)
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in brewlabs SendPress Newsletters sendpress allows Blind SQL Injection.This issue affects SendPress Newsletters: from n/a through 1.26.1.20.
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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