# CVE-2022-51021: NotificationX plugin SQL injection in notification endpoint

Source: https://junglewise.ai/threats/cve-2022-51021-notificationx-plugin-for-wordpress-2-0-0-before-2-3-12-contains  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-22. Updated: 2026-10-22  
License: CC BY 4.0 with a link back

CVE-2022-51021 · Severity: high · CVSS 8.2 · Published 2026-10-22

NotificationX is a WordPress plugin that creates FOMO and social proof notifications to boost sales and conversions. Versions 2.0.0 through 2.3.11 contain an unauthenticated SQL injection vulnerability in the REST API that allows attackers to extract sensitive database contents. An attacker can craft malicious requests to read or manipulate database records without any login credentials or special access.

Vendors: [WPDeveloper](https://junglewise.ai/threats/vendors/wpdeveloper).

## Quick answers

**Is CVE-2022-51021 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2022-51021 being exploited in the wild.

**How severe is CVE-2022-51021?** High severity, with a CVSS score of 8.2, published 22 October 2026.

**Which products and versions are affected?** WPDeveloper NotificationX 2.0.0 to 2.3.11.

**Is there a fix for CVE-2022-51021?** Yes: fixed in 2.3.12. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2022-51021 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2022-51021?** Check whether you run WPDeveloper NotificationX at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2.3.12

## Technical details

The plugin fails to validate and sanitize the array-form 'id' parameter in the /wp-json/notificationx/v1/notification/{id} REST endpoint before passing it to SQL queries. An attacker can supply id[1] with crafted SQL payloads (such as time-based SLEEP injections) along with an api_key derived from md5(home_url()) to execute arbitrary queries in the Database::get_where_query function. This is an unauthenticated, network-accessible vulnerability with no user interaction required.

## Affected products

- WPDeveloper NotificationX 2.0.0 to 2.3.11

## Timeline

- 2022: disclosed
- 2023-10-18: exploited: Exploitation observed by Shadowserver Foundation
- 2026-10-22: advisory

## References

- [https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/wordpress/notificationx-sqli.yaml](https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/wordpress/notificationx-sqli.yaml)
- [https://wordpress.org/plugins/notificationx/](https://wordpress.org/plugins/notificationx/)

## Related threats

- [WPDeveloper NotificationX cross-site scripting](https://junglewise.ai/threats/cve-2026-119507-improper-neutralization-of-script-related-html-tags-in-a-web)