Security readout for executives and security teams
Plain-English summary
CVE-2021-36906 affects the WordPress Quiz And Survey Master plugin through version 7.3.6. The issue is multiple IDOR weaknesses, meaning authorized users may be able to modify objects they should not control. Public scoring rates this low because exploitation requires high privileges and only limited integrity impact is documented.
Executive priority
Handle during normal vulnerability management unless the plugin is used on high-value sites with many delegated administrators. The documented impact is limited, but the issue still reflects broken authorization and should be cleaned up through standard plugin update governance.
Technical view
The CVE describes multiple CWE-639 authorization flaws in ExpressTech Quiz And Survey Master <= 7.3.6. CVSS 3.1 is 2.7 with network access, low complexity, high privileges required, no user interaction, unchanged scope, no confidentiality or availability impact, and low integrity impact.
Likely exposure
Exposure is limited to WordPress installations running Quiz And Survey Master version 7.3.6 or earlier. The CVSS vector indicates an attacker must already have high privileges, so anonymous internet exposure is not supported by the provided sources.
Exploitation context
The source bundle does not cite active exploitation, and the CVE is not marked as KEV. Treat this as a low-severity authorization defect unless local evidence shows untrusted or delegated high-privilege users can access the plugin.
Researcher notes
Evidence is sparse: the bundle identifies affected versions, CWE, severity, and references, but not specific endpoints, object types, or a named fixed version. Avoid assuming exploitability beyond high-privilege IDOR with low integrity impact unless vendor or Patchstack detail is separately reviewed.
Mitigation direction
- Inventory WordPress sites for Quiz And Survey Master installations.
- Confirm installed plugin versions are newer than 7.3.6.
- Review vendor and Patchstack guidance for the fixed release details.
- Restrict high-privilege WordPress accounts to trusted administrators.
- Monitor plugin-related administrative changes until remediation is confirmed.
Validation and detection
- Check WordPress plugin inventory for Quiz And Survey Master.
- Record each installed plugin version and site owner.
- Verify whether any instance is version 7.3.6 or earlier.
- Review administrative roles with access to quiz or survey management.
- Confirm remediation against vendor release notes or Patchstack.
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
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-36906 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 2.7 (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:N
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:N1.21.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
2.7LowVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Source materials
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.