Shared Files <= 1.7.48 - Unauthenticated Stored Cross-Site Scripting via sanitize_file Function
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The Shared Files – Frontend File Upload Form & Secure File Sharing plugin for WordPress is vulnerable to Stored Cross-Site Scripting via html File uploads in all versions up to, and including, 1.7.48 due to insufficient input sanitization and output escaping within the sanitize_file() function. This makes it possible for unauthenticated attackers to bypass the plugin’s MIME-only checks and inject arbitrary web scripts in pages that will execute whenever a user accesses the html file.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Anssi Laitila | Shared Files – Frontend File Upload Form & Secure File Sharing | up to 1.7.48 | — | No fix listed | CNA |
- Shared Files – Frontend File Upload Form & Secure File Sharing VendorAnssi Laitila Affected up to 1.7.48 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-4392
- 2026-10-03 Alias added: GHSA-jqmx-89c6-9c25
References
Other 4
- https://www.wordfence.com/threat-intel/vulnerabilities/id/469a9c8a-0708-4c93-99d8-e9157a1f91f5?source=cve
- https://github.com/anssilaitila/shared-files/blob/master/admin/class-sf-admin-allow-more-file-types.php
- https://wordpress.org/plugins/shared-files/#developers
- https://plugins.trac.wordpress.org/changeset/3304053/
More Anssi Laitila vulnerabilities
- TI-2024-12545 Cross-site scripting in Anssi Laitila Shared Files – Frontend File Upload Form & Secure… CVSS 3.1HIGH 7.2
- TI-2024-22773 WordPress Shared Files plugin <= 1.7.19 - Broken Access Control vulnerability CVSS 3.1MEDIUM 5.3
- TI-2026-03029 Contact List <= 3.0.18 - Authenticated (Contributor+) Stored Cross-Site Scripting via '_cl_map_iframe' Parameter CVSS 3.1MEDIUM 6.4
- TI-2022-04562 Freemius SDK <= 2.4.2 - Missing Authorization Checks CVSS 3.1MEDIUM 6.3
- TI-2024-21559 WordPress Shared Files plugin <= 1.7.16 - Broken Access Control vulnerability CVSS 3.1MEDIUM 5.3
Sources
- CVE-2025-4392 · CVE Program
- CVE-2025-4392 · NVD
- FIRST EPSS
- GHSA-jqmx-89c6-9c25 · GitHub Advisory Database · CC BY 4.0
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