Security readout for executives and security teams
Plain-English summary
CVE-2021-4344 affects the WordPress Frontend File Manager plugin through version 18.2. The plugin mishandles user IDs, allowing attackers to access information or privileges belonging to other users in the same authenticated or guest category. This can expose user data and weaken role boundaries on affected WordPress sites.
Executive priority
Treat this as a moderate-priority WordPress plugin exposure. It is not confirmed as actively exploited in the provided sources, but affected sites may allow user data or privilege boundary violations. Prioritize internet-facing WordPress sites and customer-facing portals first.
Technical view
The issue is a privilege escalation flaw mapped to CWE-285. The CVSS 3.1 score is 6.4 with network access, low complexity, changed scope, low confidentiality and integrity impact, and no availability impact. The source bundle states versions up to and including 18.2 are vulnerable.
Likely exposure
Exposure is limited to WordPress sites running the nmedia Frontend File Manager plugin at version 18.2 or earlier. Sites not using this plugin are not indicated as affected by the provided sources.
Exploitation context
The bundle does not show CISA KEV listing or confirmed active exploitation. It states unauthenticated or authenticated attackers may access information and privileges of other users within their own category, but does not provide exploit prevalence evidence.
Researcher notes
The affected-version evidence is clear for versions through 18.2, but the source bundle does not provide detailed root-cause code analysis, exploit telemetry, or a named fixed version. Validate against vendor and WordPress plugin records before concluding remediation completeness.
Mitigation direction
- Inventory WordPress sites for Frontend File Manager plugin usage.
- Upgrade to a vendor-confirmed fixed version newer than 18.2.
- If a fixed release cannot be verified, temporarily disable the plugin.
- Review vendor, Wordfence, and plugin guidance before redeploying.
- Limit plugin access to trusted users where operationally possible.
Validation and detection
- Confirm installed Frontend File Manager plugin version on each WordPress site.
- Check whether any site runs version 18.2 or earlier.
- Review user roles and file-manager access for unexpected privilege exposure.
- Inspect logs for unusual file-manager activity or cross-user access patterns.
- Document remediation status for every affected WordPress instance.
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-285: 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 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-2021-4344 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
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/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:L/UI:N/S:C/C:L/I:L/A:N3.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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 Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.