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CVE-2021-36865

18
FAUCET Score

CVE-2021-36865 is an Insecure Direct Object References (IDOR) vulnerability affecting the ExpressTech Quiz And Survey Master plugin up to version 7.3.4 in WordPress, allowing authenticated attackers to alter quiz content. Rated as MEDIUM severity with a CVSS score of 4.3, this vulnerability requires low privileges and network access, but has a low impact on integrity and no impact on confidentiality or availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 7.3.4CPE matchmatch criteria
cpe:2.3:a:quizandsurveymaster:quiz_and_survey_master:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

3.8LOW

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
1.2
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.42%
Probability of exploitation in next 30 days
EPSS Percentile
34.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0042 is in the 44th percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

patchstack.com / database/vulnerability/quiz-master-next/wordpress-quiz-and-survey-master-plugin-7-3-4-insecure-direct-object-references-idor-vulnerability
Third Party Advisory
wordpress.org / plugins/quiz-master-next
Product