Security readout for executives and security teams
Plain-English summary
CVE-2026-0604 affects the FastDup WordPress migration plugin through version 2.7. A logged-in user with Contributor or higher privileges could use a REST API parameter to read server directory contents outside the intended path. This can expose sensitive file names or directory structures that help further attacks.
Executive priority
Treat as a targeted medium-priority WordPress exposure. It requires a logged-in lower-privileged account, but the confidentiality impact is significant. Prioritize internet-facing sites, sites with many contributors, and environments where WordPress file disclosure could expose credentials, backups, or sensitive operational details.
Technical view
The issue is CWE-22 path traversal in the 'dir_path' parameter of the 'njt-fastdup/v1/template/directory-tree' REST API endpoint. Wordfence rates it CVSS 6.5: network-accessible, low complexity, low privileges, no user interaction, high confidentiality impact, no integrity or availability impact.
Likely exposure
Exposure is limited to WordPress sites running FastDup up to and including 2.7 where an attacker has Contributor-level or higher authentication. Public unauthenticated exploitation is not indicated by the provided sources.
Exploitation context
No CISA KEV listing or provided source states active exploitation. The main risk is information disclosure from directory traversal by a low-privileged authenticated account, which may reveal sensitive paths or directory contents useful for follow-on compromise.
Researcher notes
The supplied record identifies the vulnerable parameter and endpoint, affected versions through 2.7, and a WordPress Trac changeset reference. The bundle does not clearly name a fixed version. Avoid assuming exploit-in-the-wild status or patch version without additional vendor confirmation.
Mitigation direction
- Inventory WordPress sites for FastDup plugin usage and installed version.
- Prioritize sites running FastDup version 2.7 or earlier.
- Check WordPress plugin or vendor guidance for the patched release.
- Apply the vendor-supported update when available.
- Disable or remove the plugin if it cannot be safely updated.
- Review and minimize Contributor-level and higher WordPress accounts.
Validation and detection
- Confirm whether FastDup is installed on each WordPress site.
- Record the installed plugin version and compare against 2.7.
- Review logs for unexpected access to the directory-tree REST endpoint.
- Audit Contributor, Author, Editor, Administrator, and equivalent accounts.
- Compare installed code against the referenced WordPress Trac changeset where appropriate.
- Verify remediation using vendor release notes or WordPress plugin metadata.
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-22: 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-2026-0604 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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:U/C:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/ac97c729-4c75-429b-bbf2-27ca322be1cf?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/fastdup/trunk/includes/Endpoint/TemplateApi.php#L219CVE reference
- https://plugins.trac.wordpress.org/browser/fastdup/tags/2.7/includes/Endpoint/TemplateApi.php#L219CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3432226%40fastdup&new=3432226%40fastdup&sfp_email=&sfph_mail=#file3CVE 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.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.