Quiz and Survey Master (QSM) <= 11.1.0 - Unauthenticated Shortcode Injection Leading to Arbitrary Quiz Result Disclosure via Quiz Answer Text Input Fields
The Quiz And Survey Master plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to and including 11.1.0. This is due to insufficient input sanitization and the execution of do_shortcode() on user-submitted quiz answer text. User-submitted answers pass through sanitize_text_field() and htmlspecialchars(), which only strip HTML tags but do not encode or remove shortcode brackets [ and ]. When quiz results are displayed, the plugin calls do_shortcode() on the entire results page output (including user answers), causing any injected shortcodes to be executed. This makes it possible for unauthenticated attackers to inject arbitrary WordPress shortcodes such as [qsm_result id=X] to access other users' quiz submissions without authorization, as the qsm_result shortcode lacks any authorization checks.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker | <= 10.1.0 | 11.1.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-74- Platform
- WordPress
- Package
Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker- Disclosed
- 16.04.2026
- Updated
- 11.10.2026 10:23
Sources and licenses
Wordfence Intelligence - f2aa33cc-c1c4-42d4-9c2f-54648426ee4b - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Vulnerability history: Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 80
- First → latest
- 07.2015 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 4
- High 16
- Medium 60
Disclosures per year
- 2017: 0
- 2018: 0
- 2019: 2
- 2020: 4
- 2021: 6
- 2022: 16
- 2023: 10
- 2024: 7
- 2025: 5
- 2026: 28
earlier: 2
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Quiz and Survey Master (QSM) <= 11.1.0 - Unauthenticated Shortcode Injection Leading to Arbitrary Quiz Result Disclosure via Quiz Answer Text Input Fields this entry
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