EUVD-2026-59860
GHSA-crj5-47f7-xg78
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Victim must load the injected quiz page to trigger execution (UI:R); contributor authentication is required (PR:L); scope change reflects cross-browser impact with no server confidentiality or availability loss.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The Quiz and Survey Master (QSM) - Easy Quiz and Survey Maker plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'question_title' parameter in all versions up to, and including, 11.2.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AnalysisAI
Stored Cross-Site Scripting in the Quiz and Survey Master (QSM) WordPress plugin through version 11.2.1 allows authenticated attackers holding at minimum a contributor role to inject persistent JavaScript payloads via the 'question_title' parameter. The injected script executes in the browser of any user who subsequently views a page containing the poisoned quiz, enabling session hijacking, credential harvesting, or unauthorized administrative actions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an active WordPress account assigned at minimum the contributor role on the target site; unauthenticated or subscriber-level users cannot inject payloads. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N) scores 6.4 Medium, reflecting network reachability, low attack complexity, contributor-level authentication, and a scope change that captures cross-user browser impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upstream fix commits have been made in WordPress plugin SVN changesets 3609172 and 3612474; however, an exact confirmed patched release version number is not present in the available data, implying version 11.2.2 or later may contain the fixes. … Detailed patch versions, workarounds, and compensating controls in full report. |
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SQL Injection in the Quiz and Survey Master (QSM) WordPress plugin versions up to and including 11.2.1 allows authentica
Second-order SQL injection in Quiz Master Next (QSM) for WordPress through version 11.2.0 allows authenticated attackers
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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