CVE-2020-35951
An issue was discovered in the Quiz and Survey Master plugin before 7.0.1 for WordPress. It...
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).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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).
- Record
CVE-2020-35951- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AC:L/AV:N/A:H/C:L/I:L/PR:N/S:C/UI:N - Updated
- 2026-11-02
EUVDEUVD-2020-23534
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).
- Record
EUVD-2020-23534- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AC:L/AV:N/A:H/C:L/I:L/PR:N/S:C/UI:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r275-5g72-r3ph No score
An issue was discovered in the Quiz and Survey Master plugin before 7.0.1 for WordPress. It...
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).
- Record
GHSA-r275-5g72-r3ph- Weakness
- CWE-863
- Updated
- 2026-11-02
NVD
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).
- Record
CVE-2020-35951- CVSS 3.1
- 9.9 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H - CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:P - Weakness
- CWE-306
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | Wordpress Quiz and Survey Master <7.0.1 - Arbitrary File Deletion |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Nuclei, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-35951 is a critical vulnerability (CVSS 9.9) in Expresstech Quiz And Survey Master, published January 1, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 76.3%, the 99th percentile. No source names a fixed version.