EUVD-2026-43129
GHSA-6rrc-q62j-9g2p
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Remote admin-ajax reach (AV:N), no special conditions beyond a Subscriber account (AC:L, PR:L), no user interaction, and eval()-based RCE yields full C/I/A impact within the host (S:U).
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The WP Ultimate CSV Importer - WordPress Import & Export for CSV, XML & Excel plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 8.0.1 via the 'MappedFields' parameter. This is due to missing capability checks on the AJAX handlers for install_addon, saveMappedFields, and StartImport, combined with the plugin nonce being exposed to any authenticated user who can load an admin page, allowing a Subscriber to install the Import WooCommerce add-on, persist attacker-controlled PHP expressions in the MappedFields parameter, and trigger evaluation via eval() in ImportHelpers::get_meta_values(). This makes it possible for authenticated attackers, with subscriber-level access and above, to execute code on the server.
Articles & Coverage 2
AnalysisAI
Authenticated remote code execution in the Smackcoders WP Ultimate CSV Importer WordPress plugin (versions up to and including 8.0.1) lets a low-privileged Subscriber run arbitrary PHP on the server. Missing capability checks on the install_addon, saveMappedFields, and StartImport AJAX handlers, plus a plugin nonce leaked to any authenticated admin-page viewer, let an attacker install the WooCommerce add-on, persist PHP expressions in the MappedFields parameter, and force their evaluation through eval() in ImportHelpers::get_meta_values(). No public exploit is identified at time of analysis, and the flaw is not in CISA KEV; with an EPSS signal not provided, the CVSS 8.8 and trivial subscriber prerequisite make it a high patch priority.
Technical ContextAI
The affected component is a WordPress plugin that imports/exports content via CSV, XML, and Excel, built on WordPress's admin-ajax.php action framework and nonce-based CSRF protection. The root cause is CWE-94 (Improper Control of Generation of Code / Code Injection): the plugin passes attacker-influenced MappedFields data into a PHP eval() call inside ImportHelpers::get_meta_values(), so field-mapping expressions are executed as code rather than treated as data. Compounding this, the AJAX handlers (referenced in InstallAddons.php, SaveMapping.php lines 185 and 1562, and the main plugin file around line 419) perform nonce verification but omit current_user_can() capability checks, and the shared plugin nonce is rendered into pages loadable by any authenticated user - collapsing what should be an admin-only workflow down to Subscriber reach. The single affected CPE is cpe:2.3:a:smackcoders:wp_ultimate_csv_importer_-_wordpress_import_&_export_for_csv,_xml_&_excel.
RemediationAI
Upgrade the plugin to the fixed release above 8.0.1 as published by Smackcoders; the corrective code is in WordPress plugin changeset 3591135 (https://plugins.trac.wordpress.org/changeset/3591135/wp-ultimate-csv-importer), and administrators should confirm the exact patched tag on the plugin page and via the Wordfence advisory (https://www.wordfence.com/threat-intel/vulnerabilities/id/e89fc348-1146-4593-8bf5-127f783ab786) before deploying. If immediate patching is not possible, deactivate the WP Ultimate CSV Importer plugin entirely, since the import/mapping workflow is the vulnerable surface and no configuration toggle disables the affected eval() path (trade-off: import/export functionality is lost until re-enabled). As interim compensating controls, disable open user registration (Settings → General → uncheck 'Anyone can register') to remove the Subscriber foothold, and restrict access to wp-admin/admin-ajax.php actions for the install_addon, saveMappedFields, and StartImport handlers via a WAF rule or web-server rule (trade-off: overly broad admin-ajax filtering can break legitimate AJAX features for other plugins), and audit existing low-privilege accounts for unexpected users. A WordPress firewall with a virtual patch for this CVE also mitigates exposure while the update is scheduled.
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External POC / Exploit Code
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