CVE-2026-18855
Link Library に報告された脆弱性
概要
The Link Library plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the ll_delete_link_fields function in all versions up to, and including, 7.9.4 This makes it possible for unauthenticated attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). Exploitation requires the administrator to have enabled the 'Delete local file on link deletion' plugin option (disabled by default) and to subsequently permanently delete the attacker-submitted link, which is a routine moderation action.
影響を受けるバージョン
- 0以上 〜 7.9.4以下
対処方法
Link Library を 7.9.5 以降に更新してください。これで本脆弱性は解消します。
あなたのサイトは大丈夫ですか?
URLを入力するだけで、実際に使われているプラグインを検出し、 このデータベースと突き合わせて既知の脆弱性が残っていないかを確認できます。登録不要・無料です。
30秒で無料診断する参照
- https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library-admin.php#L7865
- https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library-admin.php#L7874
- https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library.php#L2288
- https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/usersubmission.php#L476
- https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/usersubmission.php#L52
- https://plugins.trac.wordpress.org/changeset/3646360/link-library/trunk/link-library-admin.php
- https://plugins.trac.wordpress.org/changeset?old_path=%2Flink-library/tags/7.9.4&new_path=%2Flink-library/tags/7.9.5
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3646361%40link-library%2Ftags%2F7.9.5&old=3626573%40link-library%2Ftags%2F7.9.4