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Critical severity · published Jan 1, 2021
CVE-2020-35951
An issue was discovered in the Quiz and Survey Master plugin before 7.0.1 for WordPress
9.9
CVSS
76.3%
EPSS
No
On KEV
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).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)76.3% · higher than 100% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QA
Quiz And Survey Master · Expresstech
before 7.0.1 · source: NVD
Affected product
QA
Quiz And Survey Master
Expresstech
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35951
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-35951
Exploit
https://wpscan.com/vulnerability/10348
Exploit
https://www.wordfence.com/blog/2020/08/critical-vulnerabilities-patched-in-quiz-and-survey-master-plugin/
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