Security readout for executives and security teams
Plain-English summary
CVE-2026-1756 affects the WP FOFT Loader WordPress plugin through version 2.1.39. A logged-in user with Author-level access or higher may upload files the site should reject. If abused, this could let an attacker run code on the web server. Risk is highest on sites allowing many contributors or with compromised author accounts.
Executive priority
Prioritize within the next patch cycle, faster for public WordPress sites with multiple authors. If the plugin is unnecessary, remove it. The business concern is site takeover or malware placement if a low-privileged account is abused.
Technical view
The issue is CWE-434 arbitrary file upload caused by incorrect file type validation in WP_FOFT_Loader_Mimes::file_and_ext. CVSS 3.1 is 8.8, with network access, low complexity, low privileges, and no user interaction. The CVE description says arbitrary uploads may make remote code execution possible.
Likely exposure
WordPress sites running WP FOFT Loader up to and including 2.1.39 are the stated exposure. Exploitation requires an authenticated Author-level or higher account, so public self-registration, contributor workflows, shared accounts, or stolen credentials increase practical risk.
Exploitation context
No provided source or KEV status indicates active exploitation. The vulnerability is still serious because it is remotely reachable after login, requires low privileges, and may lead to server-side code execution if malicious files are accepted and reachable.
Researcher notes
Public references identify the vulnerable function and a WordPress.org Trac changeset modifying MIME validation. The supplied sources do not clearly map that changeset to a fixed plugin version. Avoid assuming exploitation in the wild; KEV is false in the provided bundle.
Mitigation direction
- Identify all WordPress sites using WP FOFT Loader.
- Update WP FOFT Loader according to WordPress plugin or vendor guidance.
- If no safe update is available, disable or remove the plugin.
- Limit Author-level and higher access to trusted users only.
- Review recently added Author accounts and reset suspicious credentials.
- Monitor uploads and web directories for unexpected executable files.
Validation and detection
- Confirm the installed WP FOFT Loader version on each WordPress site.
- Treat versions up to and including 2.1.39 as affected.
- Check whether installed plugin code includes the referenced validation changeset.
- Review WordPress user roles for unnecessary Author-level access.
- Inspect upload directories for unusual or executable files.
- Review web server and WordPress logs for suspicious upload activity.
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-2026-1756 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/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/cede8ff5-f739-4eb3-9672-5adb5d2ae0a9?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/wp-foft-loader/trunk/includes/class-wp-foft-loader-mimes.php?rev=3449144#L45CVE reference
- https://plugins.trac.wordpress.org/changeset/3453101/wp-foft-loader/trunk/includes/class-wp-foft-loader-mimes.phpCVE 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.