EUVD-2026-36990
GHSA-c638-vf62-q5jh
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Unauthenticated reflected/stored XSS reachable over the network requires victim click (UI:R); script runs in victim origin causing scope change with limited C/I/A impact.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Lifecycle Timeline
1DescriptionCVE.org
Unauthenticated Cross Site Scripting (XSS) in Quiz And Survey Master <= 11.0.0 versions.
AnalysisAI
Stored or reflected cross-site scripting in the Quiz And Survey Master WordPress plugin (versions up to and including 11.0.0) allows remote unauthenticated attackers to inject malicious JavaScript that executes in a victim's browser after a single user interaction. Patchstack reports the issue under EUVD-2026-36990 with a CVSS 3.1 base score of 7.1 reflecting scope change and partial impact on confidentiality, integrity, and availability. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target site to run the Quiz And Survey Master (quiz-master-next) plugin at version 11.0.0 or earlier with a quiz/survey page or submission endpoint reachable by an unauthenticated remote attacker, and per CVSS UI:R it requires a victim to interact - typically by clicking an attacker-supplied link or visiting an attacker-controlled quiz/survey. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS vector AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L is consistent with a typical unauthenticated reflected XSS that crosses a trust boundary (scope changed) when a victim - most impactfully an authenticated WordPress administrator - clicks a crafted link. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a URL or quiz/survey submission containing a JavaScript payload that targets a vulnerable parameter on a site running Quiz And Survey Master ≤11.0.0, then phishes or socially engineers a WordPress administrator into visiting it while authenticated. When the page renders, the payload executes under the site's origin, allowing the attacker to steal the admin session cookie, perform CSRF-style actions such as creating a new admin user, or pivot to install a malicious plugin. … |
| Remediation | No vendor-released patch version was provided in the input data, so the primary action is to consult the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/quiz-master-next/vulnerability/wordpress-quiz-and-survey-master-plugin-11-0-0-cross-site-scripting-xss-vulnerability) and upgrade Quiz And Survey Master to the first release above 11.0.0 once the maintainer publishes a fix. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Inventory all WordPress installations using Quiz And Survey Master and identify instances running version 11.0.0 or earlier. …
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