CVE-2026-94663: ProfileGrid SQL Injection Vulnerability

CVE-2026-94663 Overview

CVE-2026-94663 is a blind SQL injection vulnerability in the Metagauss ProfileGrid WordPress plugin (profilegrid-user-profiles-groups-and-communities). The flaw stems from improper neutralization of special elements in SQL commands [CWE-89]. Authenticated attackers with low privileges can inject arbitrary SQL into backend database queries over the network. The vulnerability affects all plugin versions from the initial release through 6.0.0.2. Successful exploitation allows attackers to extract sensitive database contents, modify user records, or disrupt plugin functionality. The flaw has a scope-changed impact, meaning exploitation can affect resources beyond the vulnerable component itself.

Critical Impact
Authenticated attackers can perform blind SQL injection against the WordPress database, exposing user credentials, personally identifiable information (PII), and community data stored by the ProfileGrid plugin.

Affected Products

Metagauss ProfileGrid plugin for WordPress
Plugin slug: profilegrid-user-profiles-groups-and-communities
Versions from initial release through 6.0.0.2

Discovery Timeline

2026-10-09 - CVE-2026-94663 published to the National Vulnerability Database (NVD)
2026-10-09 - Last updated in NVD database

Technical Details for CVE-2026-94663

Vulnerability Analysis

The ProfileGrid plugin fails to properly sanitize user-supplied input before incorporating it into SQL queries. An authenticated user with low privileges can submit crafted request parameters that alter the structure of backend queries. Because the response does not directly reveal query output, exploitation relies on blind techniques such as boolean-based or time-based inference. Attackers iterate conditional payloads to extract data one character at a time from the wp_users, wp_usermeta, or ProfileGrid-specific tables. The scope-changed classification indicates that injected SQL can read or modify data belonging to WordPress components beyond the plugin itself.

Root Cause

The root cause is the construction of SQL statements through string concatenation or interpolation of untrusted request parameters. The plugin does not apply WordPress's $wpdb->prepare() placeholder mechanism consistently, nor does it enforce type casting on numeric inputs. This mapping of unsanitized input into query clauses enables payloads that terminate the intended statement and append attacker-controlled logic.

Attack Vector

Exploitation requires network access to the WordPress site and an authenticated session with at least Subscriber-level privileges. The attacker sends HTTP requests to a vulnerable ProfileGrid endpoint, embedding SQL metacharacters within parameters that reach the vulnerable query. No user interaction is required beyond the attacker's own authenticated session. Automated tools such as sqlmap can enumerate the injection point and extract database contents through blind inference. Refer to the Patchstack SQL Injection Advisory for additional technical context.

Detection Methods for CVE-2026-94663

Indicators of Compromise

Unusual HTTP requests to ProfileGrid plugin endpoints containing SQL metacharacters such as ', --, UNION, SLEEP(, or BENCHMARK(.
Repeated authenticated requests from a single user account exhibiting incremental parameter changes consistent with blind injection enumeration.
Database query latency spikes correlated with time-based injection payloads such as SLEEP(5).
Unexpected read access to wp_users or wp_usermeta tables outside normal plugin workflows.

Detection Strategies

Deploy a web application firewall (WAF) with signatures tuned for WordPress SQL injection patterns targeting plugin query parameters.
Enable MySQL general query logging or slow query logging on affected WordPress hosts to capture anomalous query structures.
Correlate authentication logs with HTTP request logs to identify low-privilege accounts issuing high volumes of ProfileGrid requests.

Monitoring Recommendations

Alert on HTTP 500 responses from ProfileGrid endpoints, which often indicate failed injection attempts.
Monitor for new or recently registered Subscriber accounts followed by sustained request activity against plugin URLs.
Baseline normal query patterns from the WordPress application user and alert on deviations such as UNION SELECT or boolean tautologies.

How to Mitigate CVE-2026-94663

Immediate Actions Required

Update the ProfileGrid plugin to a version later than 6.0.0.2 as soon as the vendor releases a patched build.
Audit WordPress user accounts and revoke registrations that appear suspicious or unused.
Rotate credentials for any accounts whose data may have been exposed through the plugin's user profile tables.
Review database audit logs for signs of unauthorized SELECT, UPDATE, or INSERT activity against ProfileGrid tables.

Patch Information

At the time of publication, the vulnerability affects ProfileGrid versions through 6.0.0.2. Administrators should monitor the Patchstack SQL Injection Advisory and the official Metagauss plugin page for release of a fixed version. Apply the vendor patch across all WordPress environments running the plugin.

Workarounds

Deactivate and remove the ProfileGrid plugin until a patched version is available if the plugin is not business-critical.
Restrict account registration to trusted email domains to reduce the attacker pool capable of authenticating.
Deploy WAF rules that block SQL injection payloads targeting ProfileGrid request parameters.
Enforce least-privilege database credentials for the WordPress application user to limit the scope of successful injection.

bash

# Example WAF rule concept (ModSecurity) to block common SQLi patterns on plugin endpoints
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain,phase:2,deny,status:403,id:1009463,msg:'Blocked potential SQLi against ProfileGrid'"
  SecRule ARGS "@rx (?i)(union(\s)+select|sleep\(|benchmark\(|--\s|';)" "t:none"