WordPressプラグイン「WP Compress – Instant Performance & Speed Optimization」に認可の欠如の脆弱性（WF-42d4ec8b-d3ed-4aa3-a8b9-cddaf64a7531）
概要
WordPressプラグイン「WP Compress – Instant Performance & Speed Optimization」に認可の欠如の脆弱性が確認されました。
バージョン 7.22.01 以前に影響があります。
修正版 7.22.38 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID | WF-42d4ec8b-d3ed-4aa3-a8b9-cddaf64a7531 |
|---|---|
| 脆弱性の種類 | 認可の欠如 |
| 危険度 | 中 |
| CVSSスコア |
5.3（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| 公開日 | 2026年9月8日 |
影響を受ける製品
| 製品 | 影響を受けるバージョン | 修正版 | 出典 |
|---|---|---|---|
| WordPressプラグイン「WP Compress – Instant Performance & Speed Optimization」 |
7.22.01 以前 | 7.22.38 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「WP Compress – Instant Performance & Speed Optimization」を修正版 7.22.38 またはそれ以降の公式最新版へ更新してください。
情報元の原文
Wordfence Intelligence
WP Compress <= 7.22.01 - Missing Authorization to Unauthenticated Account Linking / Site Takeover via 'force_ic_connect' and 'apikey' Parameters
The WP Compress – Instant Performance & Speed Optimization plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 7.22.01. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to link the victim site to an attacker-controlled WP Compress account, overwrite plugin settings to an aggressive live-CDN preset, and gain the shared api_key that authenticates all nopriv HMAC-gated endpoints — enabling full control over cache purging, file deletion, opcode cache invalidation, and other privileged plugin operations. This vulnerability only affects fresh installations or lite/free-mode installs where no api_key is already stored, as the sole guard fails open when the stored key is absent.
Copyright 2012-2026 Defiant Inc.
Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.