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    CVE-2020-35951

    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).

    Published:Jan 1, 2021
    Last Modified:Nov 21, 2024
    EPS:Jan 1, 2021
    EPSS Score:0.61219
    CVSS Score:9.9

    Affected Products

    Vendor
    Expresstech
    Product
    Quiz And Survey Master

    Exploits

    https://wpscan.com/vulnerability/10348https://www.wordfence.com/blog/2020/08/critical-vulnerabilities-patched-in-quiz-and-survey-master-plugin/https://wpscan.com/vulnerability/10348https://www.wordfence.com/blog/2020/08/critical-vulnerabilities-patched-in-quiz-and-survey-master-plugin/

    Related CVEs

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    CVE-2026-40787 (CVSS 7.1) — Unauthenticated Cross Site Scripting (XSS) in Quiz And Survey Master <= 11.0.0 versions.…
    CVE-2025-67987 (CVSS 8.5) — Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in ExpressT…
    CVE-2026-25329 (CVSS 4.3) — Missing Authorization vulnerability in ExpressTech Systems Quiz And Survey Master quiz-master-next allows Expl…
    CVE-2026-25324 (CVSS 5.3) — Authorization Bypass Through User-Controlled Key vulnerability in ExpressTech Systems Quiz And Survey Master q…
    CVE-2026-24358 (CVSS 4.3) — Missing Authorization vulnerability in ExpressTech Systems Quiz And Survey Master quiz-master-next allows Expl…
    CVE-2025-9318 (CVSS 6.5) — The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to time-based…
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    CVE-2025-9294 (CVSS 4.3) — The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to unauthoriz…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High