Introduction

CVE-2025-47577 affects the TI WooCommerce Wishlist WordPress plugin through version 2.9.2. The issue is an unrestricted file upload vulnerability that can allow an unauthenticated attacker to place dangerous files on a vulnerable WordPress installation, with potential for remote code execution depending on server configuration.

A public security-research repository documents the technical findings and proof-of-concept material associated with the issue. The discussion below focuses on the security impact, root cause, affected component, and defensive remediation rather than reproducing weaponized exploitation steps.

Vulnerability Overview

The vulnerable upload functionality does not sufficiently validate the actual MIME type and file contents. The public research repository describes an upload path associated with the wishlist functionality where attacker-controlled multipart data can reach server-side storage.

In simplified terms, the security problem looks like this:

Unauthenticated Request
        │
        ▼
Wishlist Upload Function
        │
        ▼
Insufficient File Validation
        │
        ▼
Arbitrary File Accepted
        │
        ▼
File Stored on Server
        │
        ▼
Potential Code Execution

The important security principle is that untrusted client input must never be allowed to cross an authentication, authorization, filesystem, or code-execution boundary without strict server-side validation.

Why Is This Vulnerability Serious?

Because the functionality is reachable without authentication, the vulnerability can cross the application's upload trust boundary. If dangerous content becomes executable, the impact can extend from unauthorized file storage to website compromise.

The potential impact depends on the application's configuration, the privileges of the affected process, and whether vulnerable functionality is exposed to untrusted users.

Root Cause

The core weakness is insufficient server-side validation of file type and content. Secure upload handlers should use an explicit allowlist, independently inspect MIME type and content, randomize filenames, restrict storage locations, and prevent script execution in upload directories.

A secure implementation should independently verify:

• Authentication and authorization requirements
• The ownership or scope of the requested object
• Input type, format, and allowed values
• Filesystem paths and canonical destinations where applicable
• File type and content where uploads are involved
• That privileged operations cannot be selected through client-controlled parameters
• That sensitive functionality fails closed when validation fails

Affected Versions / Components

The publicly documented affected details are:

These details are based on the public research repository and, where available, the corresponding NVD record. Administrators should verify the exact installed version and deployment configuration before determining exposure.

Public PoC

The associated repository contains research and proof-of-concept material demonstrating the vulnerability.

For defensive research, proof-of-concept code should only be used in an authorized laboratory environment or against systems for which explicit permission has been granted. Production systems should be tested using harmless validation methods whenever possible.

Security Impact

1. Unauthorized file upload

Unauthorized file upload can become a security concern depending on the deployment and the privileges of the affected component.

2. Storage of dangerous file types

Storage of dangerous file types can become a security concern depending on the deployment and the privileges of the affected component.

3. Potential remote code execution

Potential remote code execution can become a security concern depending on the deployment and the privileges of the affected component.

4. Website compromise

Website compromise can become a security concern depending on the deployment and the privileges of the affected component.

5. Further modification of WordPress resources

Further modification of WordPress resources can become a security concern depending on the deployment and the privileges of the affected component.

Detection and Mitigation

Administrators should first identify whether the affected component is installed and determine the exact version.

Recommended defensive actions include:

• Update to a fixed release when available.
• Remove the plugin if it is not required.
• Review upload directories for unexpected files.
• Prevent PHP and other server-side scripts from executing in upload directories.
• Review web-server logs for suspicious upload requests.
• Keep WordPress core, themes, and plugins current.

Indicators of Compromise

For incident-response purposes, administrators should review application and web-server logs around the affected functionality.

A useful investigation should examine:

Application / Web Logs
        │
        ├── Unusual Requests to Vulnerable Functions
        ├── Unexpected Authentication Events
        ├── Suspicious File Operations
        ├── Unexpected Account / Role Changes
        ├── Recently Modified Files
        └── Unusual Outbound Connections

Log evidence should be correlated with account activity, filesystem changes, deployment history, and application configuration rather than treated as a single definitive indicator.

Conclusion

CVE-2025-47577 affects the TI WooCommerce Wishlist WordPress plugin through version 2.9.2. The issue is an unrestricted file upload vulnerability that can allow an unauthenticated attacker to place dangerous files on a vulnerable WordPress installation, with potential for remote code execution depending on server configuration.

The main lesson is that security-sensitive functionality must enforce authorization and validation on the server side. Client-controlled identifiers, role values, filenames, MIME types, filesystem paths, and template content should never be trusted simply because they originated from an apparently legitimate application workflow.

For security researchers and developers, this issue provides a useful case study in secure application design, particularly around authorization boundaries, file handling, authentication, input validation, and defense-in-depth.

SOURCE: https://github.com/Yucaerin/CVE-2025-47577

References:

• https://nvd.nist.gov/vuln/detail/CVE-2025-47577