CVE-2026-92826— EWWW Image Optimizer <= 8.7.7 - Reflected Cross-Site Scripting via REQUEST_URI Parameter Key
Quick assessment
Affected
nosilver4u 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.
WordPress 的 EWWW Image Optimizer 插件存在反射型跨站脚本漏洞（Reflected Cross-Site Scripting），该漏洞影响所有 8.7.7 及更早版本，原因是插件对 REQUEST_URI 参数键缺乏充分的输入清理和输出转义。攻击者无需身份认证即可在页面中注入任意 Web 脚本，若用户被诱导执行某些操作（如点击恶意链接），则脚本将在其浏览器中执行。成功利用此漏洞需满足一个前提条件：插件中的 enable_help 选项必须处于启用状态，因为存在漏洞的 HelpScout
Possible ATT&CK Techniques 3 AI
T1190 · Exploit Public-Facing Application T1059 · Command and Scripting Interpreter T1189 · Drive-by CompromiseAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| nosilver4u | EWWW Image Optimizer | ≤ 8.7.7 |
affected |
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I. Basic Information for CVE-2026-92826
Vulnerability Information
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Vulnerability Title
EWWW Image Optimizer <= 8.7.7 - Reflected Cross-Site Scripting via REQUEST_URI Parameter Key
Source: CVE Program / CVE List V5
Vulnerability Description
The EWWW Image Optimizer plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via REQUEST_URI Parameter Key in all versions up to, and including, 8.7.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Successful exploitation requires that the enable_help option is active, as the vulnerable HelpScout Beacon script block is only emitted when that setting is enabled.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| nosilver4u | EWWW Image Optimizer | 0 ~ 8.7.7 | - |
|
II. Public POCs for CVE-2026-92826
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-92826 (1)
Security Blog Posts for CVE-2026-92826 (1)
Other References for CVE-2026-92826 (1)
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V. Comments for CVE-2026-92826
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