Llavero.io WordPress plugin: Unauthenticated SQL injection via cill_login parameter
Summary
The Llavero.io WordPress plugin up to and including version 0.1.4 does not properly sanitise and escape a parameter before using it in an SQL statement. An unauthenticated remote attacker can send crafted requests to perform blind SQL injection and read data from the WordPress database, such as user tables and password hashes. No fixed version is known, and the vendor could not be identified.
Affected
- Llavero.io WordPress plugin, all versions from 0 up to and including 0.1.4
- Vulnerable parameter: cill_login
Fixed in
Unknown. No fixed version has been published at the time of writing.
Workaround
- Deactivate and remove the plugin if it is not required
- Restrict access to wp-admin and the login page by IP allow-list, VPN or access proxy
- Apply least-privilege rights to the WordPress database account
- Use WAF rules if available; no specific rule has been verified
Exploitation
- Exploited in the wild: no evidence found
- CISA KEV: not listed according to secondary sources; not independently verified
- Public proof of concept: unconfirmed
- EPSS: about 0.18% (low predicted exploitation probability)
- CISA SSVC: exploitation none, automatable yes, technical impact partial
Our recommendation
- Inventory all WordPress sites for the Llavero.io plugin
- Remove the plugin where it is not needed, as no fix is known
- Restrict access to login paths and wp-admin at network or WAF level
- Review web server and WAF logs for requests containing the cill_login parameter
- Check the WordPress.org plugin page and changelog for a fixed release and apply it when available
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- WPScan vulnerability record wpscan.com
- OpenCVE CVE-2026-89213 app.opencve.io
- NVD mirror via Vulners vulners.com
- VulDB CVE-2026-89213 vuldb.com
- Llavero.io plugin site llavero.io
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, 09:01.
Original description (NVD)
The Llavero.io WordPress plugin through 0.1.4 does not properly sanitise and escape a parameter before using it in a SQL statement, which allows unauthenticated attackers to perform SQL injection attacks and read data from the database.
NVD references (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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