CVE-2026-91051— EWWW Image Optimizer 8.6.0 - 8.7.7 - Author+ PHP Object Injection via 'eio_page_settings' Post Meta
Quick assessment
Affected
Unknown EWWW Image Optimizer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
EWWW Image Optimizer WordPress 插件在 8.8.0 版本之前未阻止具有作者（author）级别权限的已认证用户将序列化值存储到帖子元数据字段中，而这些字段在渲染帖子时会被反序列化。这使得攻击者能够执行 PHP 对象注入（PHP Object Injection），并在存在合适的“gadget chain”（利用链）时，可能导致远程代码执行（RCE）。该漏洞存在于 8.8.0 版本之前的 EWWW Image Optimizer WordPress 插件中。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-91051
Vulnerability Information
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Vulnerability Title
EWWW Image Optimizer 8.6.0 - 8.7.7 - Author+ PHP Object Injection via 'eio_page_settings' Post Meta
Source: CVE Program / CVE List V5
Vulnerability Description
The EWWW Image Optimizer WordPress plugin before 8.8.0 does not prevent authenticated users with author-level permissions from storing a serialized value in a post meta field that is deserialized when the post is rendered, allowing them to perform PHP Object Injection, which can lead to remote code execution when a suitable gadget chain is present via another installed EWWW Image Optimizer WordPress plugin before 8.8.0 or .
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Unknown | EWWW Image Optimizer | 8.6.0 ~ 8.8.0 | - |
|
II. Public POCs for CVE-2026-91051
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-91051 (1)
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https://wpscan.com/vulnerability/e24a9497-8fb4-4067-8421-194725455d55/ exploit vdb-entry technical-description
Same Patch Batch · Unknown · 2026-09-30 · 28 CVEs total
| CVE-2026-88797 | Vayu X < 1.0.6 - Subscriber+ Arbitrary WordPress.org Plugin Installation and Activation | |
| CVE-2026-100143 | FluentCart < 1.6.5 - Unauthenticated Guest Customer Account Takeover via Checkout Email | |
| CVE-2026-75824 | WP User Frontend 2.5.8 - 4.3.11 - Unauthenticated Account Creation with Registration Disab | |
| CVE-2026-75823 | WP User Frontend 3.5.29 - 4.3.11 - Unauthenticated Privilege Escalation via Registration R | |
| CVE-2026-82127 | Schema & Structured Data for WP & AMP < 1.67 - Editor+ Stored XSS via Taxonomy Term Fields | |
| CVE-2026-80333 | Solace Extra < 1.7.2 - Unauthenticated Non-Published Post Content Disclosure via Preview R | |
| CVE-2026-83560 | New User Approve 3.1.0 - 3.2.9 - Unauthenticated PII Disclosure via Zapier API Key Bypass | |
| CVE-2026-75873 | Zella Theme < 2.6.3 - Unauthenticated Arbitrary File Upload | |
| CVE-2026-86789 | Connections Business Directory <= 10.4.67 - Unauthenticated Non-Public Directory Entry Dis | |
| CVE-2026-85001 | EmbedPress 4.4.9 - 4.6.6 - Contributor+ Stored XSS via Elementor Widget showTitle Attribut | |
| CVE-2026-85415 | Audio Player Block 1.1.0 - 1.6.2 - Contributor+ Stored XSS via Audio Download URL | |
| CVE-2026-85576 | All in One Files Upload for WooCommerce < 2.0.17 - Subscriber+ Arbitrary Plugin Settings U | |
| CVE-2026-85573 | All in One Files Upload for WooCommerce 2.0.3 - 2.0.16 - Unauthenticated Stored XSS via SV | |
| CVE-2026-88791 | Safe Redirect Manager < 2.3.0 - Open Redirect via Wildcard Redirect Rules | |
| CVE-2026-94274 | YayReviews 1.0.4 - 1.4.0 - Unauthenticated Sensitive Data Disclosure via REST API | |
| CVE-2026-87777 | Hostinger Reach 1.0.6 - 1.8.2 - Contributor+ Stored XSS via formId Elementor Widget Attrib | |
| CVE-2026-89193 | Robin Image Optimizer 2.0.0 - 2.0.7 - Unauthenticated Stored XSS via WebP URL Delivery HTM | |
| CVE-2026-89190 | Robin Image Optimizer < 2.0.8 - Subscriber+ Plugin Settings Disclosure via fy_ajax | |
| CVE-2026-90953 | Image Optimizer by Elementor < 1.7.7 - Subscriber+ Attachment Metadata and Site Statistics | |
| CVE-2026-91072 | EWWW Image Optimizer < 8.8.0 - Admin+ WebP File Rename and Deletion via Unrestricted Path |
Showing top 20 of 28 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: EWWW Image Optimizer
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CVE-2026-97067
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Same vendor: Unknown
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Content Egg < 11.9.0 - Contributor+ Stored XSS via Import Qu
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