CVE-2026-2412 json
Quiz and Survey Master (QSM) <= 10.3.5 - Authenticated (Contributor+) SQL Injection via 'merged_question' Parameter
published 2026-03-23 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-14608
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 26%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected products
- expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker
Classification
- Weakness
-
- CWE-89 Improper Neutralization of Special Elements used in an SQL Command
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/b32bf1cb-3722-41fc-be51-dabe80416b14?source=cve
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/10.3.5/php/classes/class-qsm-questions.php#L387
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L760
- plugins.trac.wordpress.org /changeset/3486710/quiz-master-next/trunk/php/rest-api.php
- plugins.trac.wordpress.org /changeset/3486710/quiz-master-next/trunk/php/classes/class-qsm-questions.php
Sources
- CVE List CVE-2026-2412
- NVD CVE-2026-2412
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.