CVE-2026-2412 | expresstech Quiz and Survey Master Plugin up to 10.3.5 on WordPress Parameter sanitize_text_field wpdb sql injection

VDB-352654 · CVE-2026-2412 · GCVE-0-2026-2412 EXPRESSTECH QUIZ AND SURVEY MASTER PLUGIN UP TO 10.3.5 ON WORDPRESS PARAMETER SANITIZE_TEXT_FIELD WPDB SQL INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.2 $0-$5k 1.93+ Summaryinfo A vulnerability categorized as critical has been discovered in expresstech Quiz and Survey Master Plugin up to 10.3.5 on WordPress. Impacted is the function sanitize_text_field of the component Parameter Handler. Executing a manipulation of the argument wpdb can lead to sql injection. The identification of this vulnerability is CVE-2026-2412. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component. Detailsinfo A vulnerability was found in expresstech Quiz and Survey Master Plugin up to 10.3.5 on WordPress. It has been declared as critical. This vulnerability affects the function sanitize_text_field of the component Parameter Handler. The manipulation of the argument wpdb with an unknown input leads to a sql injection vulnerability. The CWE definition for the vulnerability is CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes: The Quiz and Survey Master (QSM) plugin for WordPress is vulnerable to SQL Injection via the 'merged_question' parameter in all versions up to, and including, 10.3.5. This is due to insufficient sanitization of user-supplied input before being used in a SQL query. The sanitize_text_field() function applied to the merged_question parameter does not prevent SQL metacharacters like ), OR, AND, and # from being included in the value, which is then directly concatenated into a SQL IN() clause without using $wpdb->prepare() or casting values to integers. This makes it possible for authenticated attackers, with Contributor-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The weakness was shared by Thanh Hao. The advisory is available at wordfence.com. This vulnerability was named CVE-2026-2412 since 02/12/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1505 by the MITRE ATT&CK project. Upgrading to version 10.3.5 eliminates this vulnerability. Productinfo Type Survey Software Vendor expresstech Name Quiz and Survey Master Plugin Version 10.3.0 10.3.1 10.3.2 10.3.3 10.3.4 10.3.5 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.4 VulDB Meta Temp Score: 6.2 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.5 CNA Vector (Wordfence): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Sql injection CWE: CWE-89 / CWE-74 / CWE-707 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Quiz and Survey Master Plugin 10.3.5 Timelineinfo 02/12/2026 CVE reserved 03/24/2026 +40 days Advisory disclosed 03/24/2026 +0 days VulDB entry created 03/24/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wordfence.com Researcher: Thanh Hao Status: Confirmed CVE: CVE-2026-2412 (🔒) GCVE (CVE): GCVE-0-2026-2412 GCVE (VulDB): GCVE-100-352654 Entryinfo Created: 03/24/2026 02:57 Changes: 03/24/2026 02:57 (69) Complete: 🔍 Cache ID: 99:DE3:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸