WordPress WP Review Slider Pro SQL Injection via AJAX

The WP Review Slider Pro plugin for WordPress is vulnerable to SQL Injection via the 'notinstring' parameter of the wprp_load_more_revs AJAX action in versions up to, and including, 12.7.2. The parameter is read via $_POST['notinstring'] and passed through sanitize_text_field() — which strips HTML and whitespace but does not provide SQL safety. The value is then concatenated directly into a numeric/unquoted `AND id NOT IN (...)` clause and executed via $wpdb->get_results() without $wpdb->prepare() or intval() casting. Because the value sits in an unquoted numeric context, WordPress's wp_magic_quotes protection (which only escapes embedded quotes) is ineffective. The AJAX hook is registered via wp_ajax_nopriv_wprp_load_more_revs, and the required check_ajax_referer nonce is publicly available via wp_localize_script on any frontend page that renders the plugin shortcode, so an unauthenticated attacker who can reach a public page hosting the plugin can extract arbitrary data from the data

Casky was already ahead

This CVE exploits attack patterns that Casky's 322matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

The WP Review Slider Pro plugin for WordPress contains a critical SQL injection vulnerability in its AJAX handler that processes the 'notinstring' parameter. While the plugin applies sanitize_text_field() to strip HTML and whitespace, this function provides no SQL safety guarantees. The unsanitized value is then directly concatenated into a SQL query's NOT IN clause and executed without using $wpdb->prepare(), allowing attackers to inject arbitrary SQL commands. This affects all installations using versions up to 12.7.2 of the plugin. The vulnerability is particularly dangerous because AJAX endpoints are often overlooked in security reviews, and the false sense of security from sanitize_text_field() may mask the underlying SQL injection risk from developers.

Casky's 322 mapped skills leverage Claude's extended reasoning to detect the attack patterns underlying this CVE across MITRE ATT&CK's Initial Access (TA0001) and Resource Development (TA0043) techniques. Practitioners using Casky would identify indicators including: suspicious POST requests to wp-admin/admin-ajax.php with the 'action=wprp_load_more_revs' parameter containing SQL metacharacters (parentheses, quotes, UNION keywords, comment sequences); database query logs showing unusual NOT IN clauses with concatenated user input; and Web Application Firewall (WAF) logs flagging SQL injection payloads in the 'notinstring' parameter. The platform's skill mapping would correlate these technical indicators to adversary tactics like reconnaissance and exploitation, enabling security teams to distinguish between legitimate slider functionality and active exploitation attempts.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

322 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-8441.

abusing-dpapi-for-credential-access

red teaming · high

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abusing-shadow-credentials-for-privesc

red teaming · high

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achieving-cmmc-level-2-compliance

compliance governance · low

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MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-8441

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