WordPressプラグイン「ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF」に信頼できないデータのデシリアライズの脆弱性（CVE-2026-17086）
概要
WordPressプラグイン「ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF」に信頼できないデータのデシリアライズの脆弱性が確認されました。
バージョン 6.5.5 以前に影響があります。
修正版 6.5.6 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-17086 WF-89ef2ee1-2bec-459f-9a85-c260cbb129ca |
|---|---|
| 脆弱性の種類 | 信頼できないデータのデシリアライズ |
| 危険度 | 高 |
| CVSSスコア |
8.8（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 公開日 | 2026年9月17日 |
| 更新日 | 2026年9月18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「ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF」 |
6.5.5 以前 | 6.5.6 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF」を修正版 6.5.6 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
ShortPixel Image Optimizer <= 6.5.5 - Authenticated (Author+) PHP Object Injection via Nested JSON Post Content
The ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.5.5 via deserialization of untrusted input . This makes it possible for authenticated attackers, with author-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
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