# CVE-2026-116509: Quiz and Survey Master (QSM) <= 11.2.9 - Authenticated (Contributor+) SQL Injection via 'qpages' Parameter

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

The Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker plugin for WordPress is vulnerable to generic SQL Injection via the 'qpages' parameter in all versions up to, and including, 11.2.9 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. 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. The injected payload survives storage and a published-status check in display_shortcode() because a non-numeric ID causes the isPublished lookup to return an empty string, after which the payload is imploded directly into a WHERE question_id IN() clause via plain string interpolation with no wpdb->prepare() or esc_sql() call.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- expresstech / Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker: ≥ 0; ≤ 11.2.9 (affected, semver). Source: CNA: Wordfence

## Severity and prioritization

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N; source: CNA: Wordfence

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N; source: NVD: security@wordfence.com

- CISA KEV: No listing in collected sources

- EPSS: 0.46% as of 2026-11-13; percentile 40.53%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-89

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/cbca9065-6f0a-4fb3-ba54-ebd8a7c44af1?source=cve (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.9/php/classes/class-qmn-quiz-manager.php#L688 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.9/php/admin/options-page-questions-tab.php#L1187 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.9/php/admin/options-page-questions-tab.php#L1193 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.9/php/admin/options-page-questions-tab.php#L1209 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.9/php/admin/functions.php#L1135 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/changeset?reponame=&old=3779826%40quiz-master-next&new=3779826%40quiz-master-next (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.9/php/admin/functions.php#L1135 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.9/php/admin/options-page-questions-tab.php#L1187 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.9/php/admin/options-page-questions-tab.php#L1193 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.9/php/admin/options-page-questions-tab.php#L1209 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.2.9/php/classes/class-qmn-quiz-manager.php#L688 (security@wordfence.com)

- https://plugins.trac.wordpress.org/changeset?reponame=&old=3779826%40quiz-master-next&new=3779826%40quiz-master-next (security@wordfence.com)

- https://www.wordfence.com/threat-intel/vulnerabilities/id/cbca9065-6f0a-4fb3-ba54-ebd8a7c44af1?source=cve (security@wordfence.com)

## Provenance

- CNA: Wordfence: https://www.cve.org/CVERecord?id=CVE-2026-116509; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-116509; retrieved 2026-11-13; source updated 2026-11-13

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-116509; retrieved 2026-11-13; source updated Not reported

Revision: 9e0e3792e7224ea807a04bc1ea846f1439aac488f4d888a94a19da831a748915

Canonical: https://y2.dev/cve/CVE-2026-116509

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.