What’s Vulnerable › Vulnerabilities

CVE-2020-35949

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-01-01 · updated 2026-06-17
• Weakness: CWE-434

Description

An issue was discovered in the Quiz and Survey Master plugin before 7.0.1 for WordPress. It made it possible for unauthenticated attackers to upload arbitrary files and achieve remote code execution. If a quiz question could be answered by uploading a file, only the Content-Type header was checked during the upload, and thus the attacker could use text/plain for a .php file.

Affected products

• ExpressTech Quiz And Survey Master: before 7.0.1 — fixed in 7.0.1

How to fix

Upgrade to a fixed version: ExpressTech Quiz And Survey Master 7.0.1. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/10349
• https://www.wordfence.com/blog/2020/08/critical-vulnerabilities-patched-in-quiz-and-survey-master-plugin/
• https://wpscan.com/vulnerability/10349
• https://www.wordfence.com/blog/2020/08/critical-vulnerabilities-patched-in-quiz-and-survey-master-plugin/

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