CVE-2025-14477: 
WordPress vulnerability analysis and mitigation

CVE-2025-14477 is an authenticated SQL injection vulnerability in the 404 Solution plugin for WordPress, affecting all versions up to and including 3.1.0. The flaw resides in the filterText parameter of the ajaxUpdatePaginationLinks AJAX action, where insufficient sanitization allows attackers to escape SQL comment contexts and inject arbitrary SQL. It was published on December 13, 2025, with Wordfence credited as the assigner. The vulnerability carries a CVSS v3.1 base score of 4.9 (Medium) (Wordfence, Red Hat CVE).

The root cause is CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). The plugin's sanitization logic strips the $ character from user input but fails to account for the sequence *$/, which after $ removal becomes */ — effectively closing an SQL comment block and allowing the attacker to append arbitrary SQL. Exploitation targets the ajaxUpdatePaginationLinks AJAX action via a crafted HTTP request containing a malicious filterText parameter, using a time-based blind SQL injection technique to enumerate database contents. Relevant vulnerable code paths are visible in the plugin's source at includes/DataAccess.php (lines 977, 987), includes/PluginLogic.php (line 1595), and includes/sql/getRedirectsForView.sql (line 106) (Wordfence, ENISA EUVD).

Successful exploitation allows an authenticated attacker with administrator-level privileges to extract sensitive information from the WordPress database via time-based blind SQL injection, including user credentials, configuration data, and other stored content. The impact is limited to confidentiality (no integrity or availability impact per the CVSS scoring), but database credential exposure could enable further lateral movement or account takeover within the WordPress environment (Wordfence, Red Hat CVE).

Exploitation requires administrator-level authentication, which significantly limits the attack surface. No public proof-of-concept exploit code or in-the-wild exploitation has been reported as of the available data. The EPSS score is approximately 0.027% (0.000270), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog (Wordfence, ENISA EUVD).

1. Reconnaissance: Identify WordPress sites running the 404 Solution plugin (version ≤ 3.1.0) by inspecting plugin directories or using tools like WPScan.
2. Obtain administrator credentials: Gain administrator-level access to the target WordPress site through phishing, credential stuffing, or other means — this vulnerability requires authenticated access.
3. Craft malicious AJAX request: Send an authenticated HTTP POST request to the WordPress AJAX endpoint (/wp-admin/admin-ajax.php) targeting the ajaxUpdatePaginationLinks action, with the filterText parameter containing the bypass sequence *$/ followed by the SQL injection payload (e.g., *$/ AND SLEEP(5)-- -).
4. Bypass sanitization: The $ character is stripped by the sanitization logic, transforming *$/ into */, which closes the SQL comment context and allows the appended SQL to execute.
5. Extract data via time-based blind injection: Use timing differences in server responses (e.g., with SLEEP() or BENCHMARK()) to enumerate database names, tables, and sensitive data such as WordPress user hashes (Wordfence).

• Network: Unusual POST requests to /wp-admin/admin-ajax.php with action=ajaxUpdatePaginationLinks and a filterText parameter containing *$/, */, or SQL keywords such as SLEEP, BENCHMARK, or UNION.
• Logs: WordPress or web server access logs showing repeated AJAX requests to the 404 Solution endpoint with anomalous filterText values; elevated response times suggesting time-based SQL injection probing.
• Database: Unexpected or unauthorized database queries involving SLEEP() or BENCHMARK() functions originating from the WordPress application user.

Users should update the 404 Solution plugin to version 3.1.1 or later, which includes the fix applied in changeset 3417333 (WordPress Plugin Changeset). No configuration-based workaround is available; upgrading is the only recommended remediation. Site administrators should also audit WordPress admin accounts for unauthorized access and review database logs for signs of prior exploitation (Wordfence).

The vulnerability was reported and assigned by Wordfence, a leading WordPress security firm. Coverage has been picked up by aggregators including VulDB, Vulners, and CIRCL's vulnerability database. A brief post appeared on Bluesky via the CVE tracking account. No significant vendor statements, researcher commentary, or major media coverage beyond standard vulnerability aggregation has been observed (Wordfence).