Security readout for executives and security teams
Plain-English summary
Older Quiz And Survey Master WordPress plugin versions can let a highly privileged attacker change quiz content through an IDOR flaw. Business impact is mainly unauthorized content alteration and possible disruption to quiz availability. The source bundle rates severity low, and no cited source or KEV status supports active exploitation.
Executive priority
Handle through normal WordPress maintenance unless the plugin is widely deployed, internet-facing, or used for regulated training or assessments. Prioritize sites with many privileged users or weak account governance.
Technical view
CVE-2021-36865 is a CWE-639 IDOR in ExpressTech Quiz And Survey Master for WordPress versions <= 7.3.4. CVSS 3.1 is 3.8: network reachable, low complexity, high privileges required, no user interaction, with low integrity and availability impact and no confidentiality impact.
Likely exposure
Exposure is limited to WordPress sites running Quiz And Survey Master version 7.3.4 or earlier. The CVSS vector indicates an attacker needs high privileges, so risk depends heavily on admin/editor account controls and plugin version hygiene.
Exploitation context
The provided sources do not report active exploitation, and KEV status is false. The vulnerability is remotely reachable in the CVSS vector but requires high privileges, reducing broad internet-scale risk. Evidence does not include public exploit details.
Researcher notes
The source bundle identifies IDOR and quiz content modification but does not provide endpoint details, fixed-version specifics, or exploitation evidence. Avoid assuming unauthenticated impact; CVSS explicitly lists PR:H. Validate exposure through inventory and version checks rather than exploit reproduction.
Mitigation direction
- Inventory WordPress sites for Quiz And Survey Master installations.
- Upgrade affected plugin versions according to vendor or WordPress plugin guidance.
- Restrict high-privilege WordPress accounts to trusted users only.
- Review admin/editor accounts for stale, shared, or unnecessary access.
- Monitor quiz content for unexpected changes.
Validation and detection
- Confirm whether Quiz And Survey Master is installed.
- Record the installed plugin version and compare it to <= 7.3.4.
- Review WordPress user roles with quiz-editing or administrative privileges.
- Check recent quiz changes for unauthorized or unexplained edits.
- Verify the plugin is updated per vendor guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-639: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-36865 mapping review
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Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L1.22.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.8LowVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://patchstack.com/database/vulnerability/quiz-master-next/wordpress-quiz-and-survey-master-plugin-7-3-4-insecure-direct-object-references-idor-vulnerability?_s_id=cveCVE reference · x_refsource_CONFIRM
- https://wordpress.org/plugins/quiz-master-next/#developersCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Authorization Bypass Through User-Controlled Key
Authorization Bypass Through User-Controlled Key represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.