Security readout for executives and security teams
Plain-English summary
This is a critical WordPress plugin issue. Sites using MW WP Form through version 5.0.1 may let unauthenticated internet users upload files the site should reject. The source says this may make remote code execution possible, so exposed sites should be treated as high-priority until the plugin is removed, disabled, or confirmed fixed.
Executive priority
Prioritize this for immediate remediation on any internet-facing WordPress site using MW WP Form. The business risk is website takeover, data exposure, defacement, or service disruption if arbitrary uploads become executable.
Technical view
CVE-2023-6316 is an arbitrary file upload weakness in MW WP Form’s _single_file_upload function, caused by insufficient file type validation. The CVSS 3.1 score is 9.8 with network, low-complexity, no-authentication, no-user-interaction characteristics and full confidentiality, integrity, and availability impact.
Likely exposure
Public WordPress sites running MW WP Form versions up to and including 5.0.1 are the relevant exposure. Because authentication is not required, internet-facing forms or endpoints using the plugin deserve immediate inventory and review.
Exploitation context
The source bundle does not identify known active exploitation, and KEV status is false. The vulnerability is still severe because unauthenticated arbitrary upload can place attacker-controlled files on the server and may lead to remote code execution.
Researcher notes
Evidence names CWE-434 and points to insufficient validation in class.file.php around _single_file_upload, plus a WordPress plugin changeset. The bundle does not provide exploit telemetry or a named fixed version, so avoid claiming exploitation or a specific patch without vendor confirmation.
Mitigation direction
- Inventory all WordPress sites for MW WP Form and its installed version.
- Disable or remove MW WP Form where versions are 5.0.1 or older.
- Check vendor guidance and apply a fixed release newer than the vulnerable version.
- Review upload handling and block server-side execution from upload directories where applicable.
- Monitor web and WordPress logs for suspicious unauthenticated upload activity.
Validation and detection
- Confirm whether MW WP Form is installed on each WordPress instance.
- Record the plugin version and flag versions up to 5.0.1.
- Verify remediation by confirming the plugin is disabled, removed, or updated.
- Review file upload locations for unexpected recently created files.
- Check whether public forms still permit unsafe file types after remediation.
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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program 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-2023-6316 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
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b2c03142-be30-4173-a140-14d73a16dd2b?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/mw-wp-form/tags/5.0.1/classes/models/class.file.php#L60CVE reference
- https://plugins.trac.wordpress.org/changeset/3003065/mw-wp-form#file15CVE 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.
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.