Security readout for executives and security teams
Plain-English summary
MainWP File Uploader Extension for WordPress has a critical unauthenticated arbitrary file upload issue through version 4.1. In business terms, an exposed vulnerable site could allow an outside attacker to upload dangerous files, risking site takeover, data theft, defacement, or outage. The supplied sources do not show active exploitation or a named fixed version.
Executive priority
Treat this as urgent for any internet-facing WordPress estate using the affected extension. The issue is critical severity and unauthenticated, but urgency should be tied to confirmed presence of MainWP File Uploader Extension through 4.1.
Technical view
CVE-2023-23656 is a CWE-434 unrestricted upload of dangerous file type vulnerability in MainWP File Uploader Extension through 4.1. CVSS 3.1 is 10.0 with network access, low complexity, no privileges, no user interaction, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to WordPress environments running MainWP File Uploader Extension version 4.1 or earlier, especially internet-facing administration or managed WordPress deployments. The bundle marks other versions as unaffected by default but gives no detailed CPE coverage.
Exploitation context
The source bundle and KEV flag do not support saying this is actively exploited. However, unauthenticated arbitrary file upload on a WordPress extension is a high-risk pattern because successful abuse can affect the web application and potentially the hosting environment.
Researcher notes
Evidence supports CWE-434 and CVSS 10.0 impact for MainWP File Uploader Extension through 4.1. The supplied data does not provide exploit details, active exploitation evidence, or a specific fixed version, so remediation should be verified against vendor or Patchstack guidance.
Mitigation direction
- Identify any MainWP File Uploader Extension installations through version 4.1.
- Disable or remove affected installations if no vendor-confirmed fixed release is available.
- Check MainWP and Patchstack guidance for a supported fixed version or official remediation.
- Restrict administrative exposure and unnecessary upload functionality while remediation is pending.
- Prioritize backups and recovery readiness for affected WordPress sites.
Validation and detection
- Review WordPress plugin inventories for MainWP File Uploader Extension version 4.1 or earlier.
- Confirm affected extensions are removed, disabled, or updated per vendor guidance.
- Inspect web content and upload locations for unexpected dangerous file types.
- Review web and application logs for suspicious unauthenticated upload activity.
- Verify exposed sites no longer run the vulnerable extension version.
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-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-23656 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
- Critical
- CVSS
- 10 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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:N/UI:N/S:C/C:H/I:H/A:H3.96Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.