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

> Authenticated attackers can inject SQL to extract sensitive database contents from the Chaty Pro WordPress plugin.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Jul 2026
- **Updated:** 28 Jul 2026
- **Also known as:** GHSA-h976-4r88-23hx

## What is CVE-2026-6251?

CVE-2026-6251 is a medium-severity SQL injection vulnerability in Chaty Pro, published on 28 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2026-6251?


## How do I fix CVE-2026-6251?

No fix has been published for CVE-2026-6251 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6251 being exploited?

There is no known exploitation of CVE-2026-6251 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6251 and fix it if it is affected.

What it is: CVE-2026-6251 is a medium-severity SQL injection vulnerability in Chaty Pro, published on 28 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-6251 in the wild and no public exploit code.

Affected product: Chaty Pro. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-6251/ (Markdown: https://insights.sbomify.com/CVE-2026-6251/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6251
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6251
- OSV: https://osv.dev/vulnerability/CVE-2026-6251

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6251/
Summaries are generated and may contain mistakes; the official description above is the record.