What’s Vulnerable › Vulnerabilities

CVE-2026-109218: Contact Manager <= 9.1.2 - Unauthenticated Arbitrary File Upload via Trailing-Dot Filename Blacklist Bypass

Description

The Contact Manager plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 9.1.2 via the add_message function. This is due to an incomplete extension blacklist that fails to detect dangerous extensions when a trailing dot causes the extension-derivation routine to return an empty string, which sanitize_file_name() then silently removes before the file is written to disk. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. Successful code execution additionally requires the server to use Apache with libapache2-mod-php (which maps .phar to PHP by default) and the attacker to retrieve the uploaded file within the brief window before it is removed by unlink() at end of request.

Summary

The Kleor Contact Manager plugin for WordPress is vulnerable to unauthenticated arbitrary file upload in all versions up to and including 9.1.2. A trailing-dot filename bypasses the extension blacklist, letting an unauthenticated attacker upload potentially executable files and, under Apache with libapache2-mod-php, achieve remote code execution if the file is retrieved before unlink() removes it. CVSS is 9.8 critical; it is not in CISA KEV and no exploitation is reported. Update the plugin beyond 9.1.2 once a fixed release is available, or disable/remove the plugin until then.

تُعاني إضافة Kleor Contact Manager لـ WordPress من ثغرة رفع ملفات عشوائية دون مصادقة في جميع الإصدارات حتى 9.1.2 включительно. يؤدي تجاوز القائمة السوداء للامتدادات عبر اسم ملف ينتهي بنقطة إلى تمكين المهاجم غير المصادق من رفع ملفات قد تكون قابلة للتنفيذ، ومع Apache مع libapache2-mod-php قد يتحقق تنفيذ تعليمات برمجية عن بُعد إذا جرى استرجاع الملف قبل حذفه بواسطة unlink(). درجة CVSS هي 9.8 حرجة، ولا توجد في CISA KEV ولم يُبلَّغ عن استغلال فعلي. حدّثوا الإضافة إلى إصدار أحدث من 9.1.2 فور توفره، أو عطّلوا الإضافة أو أزيلوها حتى ذلك الحين.

Affected products

References

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