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CVE-2022-51021: NotificationX WordPress Plugin < 2.3.12 Unauthenticated SQL Injection via notification REST endpoint

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-22 · updated 2026-10-23
• Weakness: CWE-89

Description

NotificationX plugin for WordPress 2.0.0 before 2.3.12 contains an unauthenticated SQL injection vulnerability that allows remote attackers to manipulate database queries by supplying an array-form 'id' parameter to /wp-json/notificationx/v1/notification/{id}. Attackers can pass id[1] with crafted SQL, such as time-based SLEEP payloads, along with an api_key derived from md5(home_url()), which flows unsanitized into Database::get_where_query to extract database contents. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-18.

Affected products

• wpdevteam NotificationX – FOMO, Live Sales Notification, WooCommerce Sales Popup, GDPR, Social Proof, Announcement Banne: from 2.0.0 before 2.3.12 — fixed in 2.3.12

How to fix

Upgrade to a fixed version: wpdevteam NotificationX – FOMO, Live Sales Notification, WooCommerce Sales Popup, GDPR, Social Proof, Announcement Banne 2.3.12. Check the vendor advisory for mitigations.

References

• https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/wordpress/notificationx-sqli.yaml
• https://wordpress.org/plugins/notificationx/
• https://wpscan.com/vulnerability/d1480717-726d-4be2-95cb-1007a3f010bb
• https://www.vulncheck.com/advisories/notificationx-wordpress-plugin-2.3.12-unauthenticated-sql-injection-via-notification-rest-endpoint

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