Pro Like Button WordPress plugin: Unauthenticated SQL injection
Summary
The WordPress plugin Pro Like Button before version 2.0 does not properly sanitize and escape the 'postid' parameter before using it in a SQL query. An unauthenticated attacker can send crafted requests to the public like/dislike handler to read database content, which may include user data. The CVSS score is 8.6 (high), and the CISA SSVC assessment rates the attack as automatable. No public exploit code has been confirmed.
Affected
- Pro Like Button versions before 2.0, according to the CVE record and WPScan.
- The exact affected range is not fully confirmed. VulDB describes it as up to 1.x, and the 1.0.5 changelog mentions a related unauthenticated SQL injection fix.
Fixed in
- Version 2.0 or later (WPScan: fixed in 2.0).
Workaround
- Temporary measure: a web application firewall rule that detects and blocks SQL injection patterns targeting the 'postid' parameter (a stopgap only).
- Restrict the database account used by WordPress to least privilege to limit the impact.
- If the plugin is not essential, deactivate and remove it until it is updated to 2.0 or later.
Exploitation
- No public proof of concept has been confirmed.
- Not listed in the CISA Known Exploited Vulnerabilities catalog.
- CISA SSVC: Exploitation none, Automatable yes, Technical Impact partial.
- No in-the-wild exploitation is known in the sources.
Our recommendation
- Check whether the plugin is installed on any public WordPress site and which version is running.
- Update to version 2.0 or later, or remove the plugin.
- Review database and web server logs for SQL injection-style requests to the plugin's endpoints.
- Make sure the WordPress database account has only the required privileges.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- WPScan: Pro Like Button < 2.0 - Unauthenticated SQLi via 'postid' Parameter wpscan.com
- VulDB: CVE-2026-89296 vuldb.com
- WordPress.org: Pro Like Button plugin wordpress.org
- Strix: CVE-2026-89296 www.strix.ai
- GitHub issue: CVE-2026-89296 alert record github.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 1 Nov 2026, 09:34.
Original description (NVD)
The Pro Like Button WordPress plugin before 2.0 does not properly sanitize and escape a parameter before using it in a SQL query, allowing unauthenticated users to perform SQL injection attacks.
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.
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.