CVE-2026-27413: 
WordPress vulnerability analysis and mitigation

CVE-2026-27413 is a Blind SQL Injection vulnerability in the Cozmoslabs Profile Builder Pro WordPress plugin, classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). It affects Profile Builder Pro versions up to and including 3.13.9, with the fix introduced in version 3.14.0. The vulnerability was published on March 19, 2026, and assigned by Patchstack. It carries a CVSS v3.1 base score of 9.3 (Critical) (Feedly, Patchstack).

The vulnerability stems from insufficient sanitization of user-supplied input that is incorporated into SQL queries within the Profile Builder Pro plugin, allowing an attacker to manipulate query logic (CWE-89). The attack vector is network-based, requires no authentication (unauthenticated), no user interaction, and has low attack complexity, making it trivially exploitable remotely. The exploitation technique is Blind SQL Injection (CAPEC-7), meaning the attacker infers database contents through boolean-based or time-based side channels rather than direct query output. Related attack patterns include command-line execution through SQL injection (CAPEC-108) and expanding OS control from the database (CAPEC-470) (Feedly, Patchstack).

Successful exploitation allows an unauthenticated remote attacker to extract sensitive data from the WordPress database, including user credentials, personal information, and other confidential application data, with high confidentiality impact. The vulnerability has a changed scope, meaning its impact can extend beyond the plugin itself to the broader WordPress database environment. Availability is also partially affected (low impact), potentially causing service degradation, while integrity is not directly impacted by this vulnerability (Feedly).

As of the time of reporting, there is no public proof-of-concept exploit code and no confirmed evidence of in-the-wild exploitation (Feedly). The EPSS score is approximately 0.03%, indicating a currently low probability of exploitation in the near term. No threat actor attribution has been reported, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. However, the unauthenticated, network-accessible nature of the flaw and its critical CVSS score make it a high-priority target if a PoC is released.

1. Reconnaissance: Identify WordPress sites running the Profile Builder Pro plugin (versions ≤ 3.13.9) using tools like WPScan, Shodan, or by inspecting plugin directories on publicly accessible WordPress installations.
2. Identify vulnerable endpoint: Locate the specific plugin functionality that processes unsanitized user input passed to SQL queries (e.g., registration or profile-related form parameters).
3. Craft blind SQL injection payload: Construct boolean-based or time-based blind SQL injection payloads (e.g., using AND SLEEP(5)-- or AND 1=1-- / AND 1=2-- patterns) targeting the vulnerable parameter.
4. Automate data extraction: Use tools such as sqlmap with the identified endpoint and parameter to automate blind SQL injection, iterating through database schema, table names, and column contents.
5. Exfiltrate sensitive data: Extract WordPress user table contents (e.g., wp_users), including usernames, hashed passwords, and email addresses, for offline cracking or further attack use (Feedly, Patchstack).

• Network: Unusual or repeated HTTP requests to Profile Builder Pro plugin endpoints (e.g., registration or profile form URLs) containing SQL metacharacters such as single quotes ('), AND, OR, SLEEP, BENCHMARK, or encoded equivalents in parameter values.
• Logs: WordPress or web server access logs showing high volumes of requests to the same plugin endpoint with varying parameter values; requests containing patterns like AND+SLEEP, 1=1, 1=2, or URL-encoded SQL syntax.
• Database: Unexpected or anomalous database query patterns in MySQL slow query logs, particularly time-delayed queries (SLEEP() or BENCHMARK()) originating from the web application user.
• Process: Elevated database query times or unusual spikes in database CPU usage consistent with time-based blind SQL injection probing.

The vendor (Cozmoslabs) addressed this vulnerability in Profile Builder Pro version 3.14.0; all users should upgrade immediately from versions 3.13.9 and earlier (Patchstack). As interim mitigations, administrators should implement a Web Application Firewall (WAF) with SQL injection rules to block malicious requests, and review database user permissions to enforce the principle of least privilege for the WordPress database account. Input validation and the use of parameterized queries (prepared statements) are recommended development-level controls to prevent recurrence.

The vulnerability received coverage from The Hacker Wire and was discussed on Mastodon and Bluesky shortly after disclosure, reflecting community awareness of the critical severity rating (The Hacker Wire). Security aggregators including VulDB, CIRCL, and ENISA's EUVD catalogued the issue promptly. No major vendor statements beyond the Patchstack advisory have been issued, and community reaction has been moderate given the absence of a public PoC or active exploitation.