High · CVSS 8.8CVE-2022-51021

NotificationX WordPress Plugin < 2.3.12 Unauthenticated SQL Injection via notification REST endpointCVE-2022-51021

Answer in brief

CVE-2022-51021 records a High severity (CVSS 8.8) vulnerability in NotificationX WordPress Plugin < 2.3.12 Unauthenticated SQL Injection via notification REST endpoint. The current sources do not mark it as known exploited. The current feed maps WPDeveloper/NotificationX (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 22, 2026Updated Oct 22, 2026Source checked Oct 22, 2026First seen by HOL Oct 22, 2026Material review Oct 22, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps WPDeveloper/NotificationX (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
WPDeveloper/NotificationXgeneric	>=2.0.0 <2.3.12	2.3.12

Recommended response

Check inventory. Check lockfiles and deployed manifests for WPDeveloper/NotificationX.
Review the reported fix. Update WPDeveloper/NotificationX to 2.3.12 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 22, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.