# CVE-2026-5797: Code injection in Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker

> Unauthenticated attackers can inject WordPress shortcodes into quiz answers to access other users' private quiz results without authorization.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Apr 2026
- **Updated:** 17 Apr 2026
- **Also known as:** GHSA-7rv8-2hr2-39f9

## What is CVE-2026-5797?

CVE-2026-5797 is a medium-severity code injection vulnerability in expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker, published on 17 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2026-5797?


## How do I fix CVE-2026-5797?

No fix has been published for CVE-2026-5797 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5797 being exploited?

There is no known exploitation of CVE-2026-5797 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5797 and fix it if it is affected.

What it is: CVE-2026-5797 is a medium-severity code injection vulnerability in expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker, published on 17 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-5797 in the wild and no public exploit code.

Affected product: expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-5797/ (Markdown: https://insights.sbomify.com/CVE-2026-5797/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5797
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5797
- OSV: https://osv.dev/vulnerability/CVE-2026-5797

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-5797/
Summaries are generated and may contain mistakes; the official description above is the record.