WP2LEADS WordPress plugin: SQL injection by authenticated subscribers
Summary
WP2LEADS, a WordPress plugin that connects WordPress and WooCommerce with the KlickTipp email marketing service, contains an SQL injection flaw in versions up to and including 3.5.7. An attacker with a Subscriber-level account can inject SQL statements, which may allow reading, modifying or deleting data in the website database, including user accounts. The attack requires a logged-in account, so the exposure depends on whether untrusted users can register on the site.
Affected
- WP2LEADS plugin up to and including 3.5.7
- Required privilege: Subscriber (authenticated user)
Fixed in
- Patched in version 3.5.12 according to Patchstack; verify on the WordPress.org changelog
Workaround
- Disable open user registration where it is not needed and review existing subscriber accounts
- Deactivate and remove the plugin if it is not required
- Patchstack reports a mitigation rule that blocks attacks until the update is applied; ask your hosting provider or a WordPress firewall vendor about virtual patching
Exploitation
- No known exploitation in the wild; not listed as known exploited
- CISA SSVC: exploitation none, not automatable
- No public proof of concept found
- Patchstack rates the issue as high priority and expects exploitation
Our recommendation
- Update WP2LEADS to version 3.5.12 or later; if an update is not possible, deactivate the plugin
- Check whether WP2LEADS is installed on your sites and whether subscriber registration is open
- Review database and web logs for unusual requests from subscriber accounts
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack vulnerability advisory patchstack.com
- HOL Guard CVE-2026-25434 hol.org
- Strix CVE-2026-25434 www.strix.ai
- CVEBrief archive cvebrief.com
- WordPress.org WP2LEADS plugin page wordpress.org
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 1 Nov 2026, 11:25.
Original description (NVD)
Subscriber SQL Injection in WP2LEADS <= 3.5.7 versions.
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.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.