Security readout for executives and security teams
Plain-English summary
This is a low-severity reflected XSS issue in the WordPress Quiz And Survey Master plugin. An attacker already holding editor-level or higher access could cause limited script execution through a user-interaction path. Business urgency is mainly for WordPress sites with many privileged content users or weak account controls.
Executive priority
Treat this as routine remediation unless the site has many privileged WordPress users or weak account governance. It is not supported as actively exploited by the provided sources.
Technical view
CVE-2021-36864 is CWE-79 reflected XSS in ExpressTech Quiz And Survey Master for WordPress versions 7.3.4 and earlier. The CVSS 3.1 score is 3.4 with network access, low attack complexity, high privileges required, user interaction required, changed scope, and low integrity impact.
Likely exposure
Exposure is limited to WordPress sites running Quiz And Survey Master version 7.3.4 or earlier, especially where editor-level users are numerous, shared, or weakly governed.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires authenticated editor-level or higher access plus user interaction, reducing broad internet-scale risk.
Researcher notes
The evidence identifies affected versions and CVSS characteristics, but the bundle does not include a specific fixed version or detailed vulnerable parameter. Avoid assuming exploit availability or remediation beyond vendor-confirmed guidance.
Mitigation direction
- Inventory WordPress sites using Quiz And Survey Master.
- Check installed plugin versions for 7.3.4 or earlier.
- Review vendor, WordPress.org, and Patchstack guidance for the fixed release.
- Update, disable, or remove the plugin if no safe supported version is confirmed.
- Limit editor-level access to trusted users only.
- Enforce strong authentication for privileged WordPress accounts.
Validation and detection
- Confirm plugin presence and version in WordPress administration or asset inventory.
- Verify whether any instance runs version 7.3.4 or earlier.
- Check user roles with editor-level or higher privileges.
- Review web application security findings for reflected XSS reports involving this plugin.
- Confirm remediation by rechecking plugin version after maintenance.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2021-36864 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
- 3.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/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:R/S:C/C:N/I:L/A:N1.71.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.4LowVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.