CVE-2026-11421

ERP: Complete HR, Accounting & CRM Suite with WooCommerce CRM Support <= 1.17.4 - Authenticated (Custom+) SQL Injection via 'erpadvancefilter' Parameter

2026-08-04 16:17
Hyunsoo Jeong

Strategic Overview

Status
Patched in 1.17.5
Affected Plugin
ERP: Complete HR, Accounting & CRM Suite Built for WooCommerce
Affected Version
<= 1.17.4
CVSS
6.5Medium
Weakness type
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE
CVE-2026-11421
View all ERP: Complete HR, Accounting & CRM Suite Built for WooCommerce vulnerabilities

At a glance

CVE-2026-11421 is a medium-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the ERP WordPress plugin, affecting versions <= 1.17.4. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires an authenticated account at Custom level or above. The issue is fixed in version 1.17.5; sites on affected versions should update now. Disclosed August 2026, reported by Hyunsoo Jeong.

Vulnerability Overview

The ERP: Complete HR, Accounting & CRM Suite with WooCommerce CRM Support plugin for WordPress is vulnerable to SQL Injection via the 'erpadvancefilter' parameter in all versions up to, and including, 1.17.4 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. The handler runs the value through sanitize_text_field, which preserves single quotes, and the downstream erp_crm_contact_advance_filter() function interpolates it directly into a single-quoted SQL WHERE clause before execution via $wpdb->get_results(). This makes it possible for authenticated attackers, with the plugin-supplied CRM Agent role (or higher CRM Manager / WordPress admin) and the erp_crm_list_contact capability, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

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

ERP <= 1.17.4 carries this weakness at erpadvancefilter, and reaching it takes an account at Custom level or above. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For ERP the fix is 1.17.5: builds <= 1.17.4 are affected, anything from 1.17.5 onward is not.

Remediation

Update to version 1.17.5, or a newer patched version

How WordSec helps

An attacker needs Custom access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: ERP 1.17.5 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-11421https://www.wordfence.com/threat-intel/vulnerabilities/id/c8f3c96b-9a78-47cb-9266-ff87d9409160https://nvd.nist.gov/vuln/detail/CVE-2026-11421

Related records

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