CVE-2025-1304: Spicethemes Newsblogger RCE Vulnerability

CVE-2025-1304 Overview

CVE-2025-1304 is an arbitrary file upload vulnerability in the NewsBlogger theme for WordPress, developed by Spicethemes. The flaw exists in the newsblogger_install_and_activate_plugin() function, which lacks a proper capability check. All versions up to and including 0.2.5.1 are affected.

Authenticated attackers with subscriber-level access or higher can upload arbitrary files to the affected site's server. Successful exploitation can lead to remote code execution under the web server's privileges. The vulnerability is categorized under CWE-862: Missing Authorization.

Critical Impact

Authenticated subscribers can upload arbitrary PHP files to vulnerable WordPress installations, enabling full site compromise through remote code execution.

Affected Products

• Spicethemes NewsBlogger theme for WordPress, all versions up to and including 0.2.5.1
• WordPress installations using the affected NewsBlogger theme
• Sites permitting subscriber-level user registration with the vulnerable theme active

Discovery Timeline

• 2025-05-01 - CVE-2025-1304 published to NVD
• 2025-05-06 - Last updated in NVD database

Technical Details for CVE-2025-1304

Vulnerability Analysis

The vulnerability resides in the newsblogger_install_and_activate_plugin() function within the NewsBlogger theme's functions.php file. This function is intended to handle plugin installation and activation operations from within the WordPress admin interface.

The function fails to verify the calling user's capability before processing requests. WordPress provides capability checks such as current_user_can('install_plugins') to restrict sensitive operations to administrators. Without this check, any authenticated user, including those with the lowest privilege subscriber role, can invoke the function.

Because the function performs file upload and plugin installation operations, attackers can supply arbitrary archive contents that get written to the server's filesystem. The uploaded PHP files can then be executed by issuing HTTP requests to their location, resulting in remote code execution.

Root Cause

The root cause is a missing authorization check [CWE-862] in newsblogger_install_and_activate_plugin(). The function processes a privileged action without confirming the requester holds the required install_plugins or manage_options capability. Theme developers relied on implicit trust rather than enforcing role-based access control at the function entry point.

Attack Vector

The attack proceeds over the network and requires only a low-privileged authenticated account. An attacker registers as a subscriber on any site permitting open registration, authenticates, and then issues a crafted request to the AJAX or admin endpoint that invokes newsblogger_install_and_activate_plugin(). The request supplies attacker-controlled file content, which the function writes into the WordPress installation directory. The attacker then requests the resulting PHP file, executing arbitrary code in the context of the web server. Refer to the Wordfence Vulnerability Report and the WordPress Theme Code Review for technical details.

Detection Methods for CVE-2025-1304

Indicators of Compromise

• Unexpected PHP files appearing in wp-content/plugins/ or theme directories with recent modification timestamps
• HTTP POST requests to admin-ajax.php containing the action parameter newsblogger_install_and_activate_plugin
• New or unexpected WordPress plugins activated without administrator action in the site audit log
• Outbound network connections from the web server process to unfamiliar hosts following file upload activity

Detection Strategies

• Inspect web server access logs for authenticated requests to NewsBlogger theme endpoints originating from subscriber-level accounts
• Monitor the WordPress filesystem for newly created .php, .phtml, or archive files in plugin and theme directories
• Apply file integrity monitoring to the WordPress installation root and alert on additions outside the documented update process

Monitoring Recommendations

• Enable WordPress audit logging plugins to record plugin install, activate, and file modification events
• Forward web server and PHP error logs to a central log analysis platform and correlate authentication events with file write activity
• Track new user registrations and flag subscriber accounts that subsequently issue requests to plugin installation endpoints

How to Mitigate CVE-2025-1304

Immediate Actions Required

• Update the NewsBlogger theme to a version newer than 0.2.5.1 as soon as the vendor publishes a fixed release
• Audit the WordPress installation for unauthorized PHP files, suspicious plugins, and unknown administrator accounts
• Disable open user registration or restrict the default new user role to a custom role without access to theme AJAX actions
• Rotate all administrator and database credentials if compromise is suspected

Patch Information

Review the WordPress Theme Code Review for the corrected functions.php implementation in version 0.2.5.5 and consult the Wordfence Vulnerability Report for the current remediation status.

Workarounds

• Deactivate the NewsBlogger theme and switch to a maintained theme until a patched version is verified
• Block requests to admin-ajax.php with the newsblogger_install_and_activate_plugin action at the web application firewall layer
• Restrict access to /wp-admin/ paths by IP allowlist where feasible to limit exposure of authenticated endpoints