expresstech Quiz and Survey Master Plugin up to 10.1.0 on WordPress do_shortcode cross site scripting

Summaryinfo

A vulnerability has been found in expresstech Quiz and Survey Master Plugin up to 10.1.0 on WordPress and classified as problematic. This affects the function do_shortcode. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2026-5797. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in expresstech Quiz and Survey Master Plugin up to 10.1.0 on WordPress and classified as problematic. This issue affects the function do_shortcode. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

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.

The weakness was published by Rafshanzani Suhada. The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-5797 since 04/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 10.3.5 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Survey Software

Vendor

• expresstech

Name

• Quiz and Survey Master Plugin

Version

• 10.0
• 10.1.0

CPE 2.3info

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• 🔒

CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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