Security readout for executives and security teams
Plain-English summary
CVE-2021-4366 affects the WordPress PWA for WP & AMP plugin. In vulnerable versions through 1.7.32, a logged-in user could change plugin settings that should require higher privileges. The business risk is unauthorized configuration change, not unauthenticated takeover. Public sources here do not show confirmed active exploitation.
Executive priority
Treat this as a moderate-priority WordPress hygiene issue. Prioritize externally reachable sites with user registration, customer accounts, or multiple content authors. It should be remediated promptly, but the provided evidence does not support emergency response for active exploitation.
Technical view
This is CWE-862: missing authorization. The pwaforwp_update_features_options function lacked a capability check, allowing authenticated low-privileged users to alter restricted plugin options. CVSS 3.1 is 6.3, with network access, low complexity, low privileges required, and no user interaction.
Likely exposure
Exposure is most likely on WordPress sites running PWA for WP & AMP at version 1.7.32 or earlier, especially where subscriber, contributor, customer, or other low-privileged accounts can log in.
Exploitation context
The provided bundle marks CISA KEV as false and does not cite confirmed exploitation in the wild. Exploitation requires an authenticated account, which reduces reach but still matters on membership, ecommerce, multi-author, and customer-portal WordPress sites.
Researcher notes
The key condition is authenticated access plus missing capability enforcement in pwaforwp_update_features_options. Source details identify impact as restricted plugin setting changes with limited confidentiality, integrity, and availability impact. The bundle does not provide exploit code, proof of active exploitation, or exact fixed-version metadata.
Mitigation direction
- Inventory WordPress sites for the PWA for WP & AMP plugin.
- Upgrade the plugin beyond 1.7.32 if a fixed release is available.
- If updating is not possible, disable the plugin until vendor guidance is reviewed.
- Restrict or remove unnecessary low-privileged WordPress accounts.
- Monitor plugin settings for unauthorized or unexpected changes.
Validation and detection
- Confirm installed plugin name and version on each WordPress site.
- Verify whether any site runs version 1.7.32 or earlier.
- Review WordPress users with login access and low-privileged roles.
- Check plugin configuration history or backups for unexpected changes.
- Review vendor, Wordfence, Nintechnet, and WPScan advisories for fixed-version details.
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-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-4366 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
- Medium
- CVSS
- 6.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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:L/UI:N/S:U/C:L/I:L/A:L2.83.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a9892dd1-3939-41a9-a828-fa1bf7d96eb8?source=cveCVE reference
- https://blog.nintechnet.com/wordpress-pwa-for-wp-and-amp-plugin-fixed-vulnerabilities/CVE reference
- https://wpscan.com/vulnerability/b38a51d7-375e-4cca-88ba-ccab796ac134CVE reference
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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.