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CVE-2026-19698— GutenKit < 2.5.1 - Contributor+ Stored CSS Injection

Quick assessment

Affected
Unknown GutenKit
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.

GutenKit WordPress 插件 2.5.1 版本之前，未在将样式设置保存到帖子后、用于构建前端输出的 CSS 之前，对这些设置进行验证或转义。这使得具有 Contributor（贡献者）角色及以上权限的用户，能够向发送给其他用户及匿名访客的页面中注入任意 CSS。由于在该角色下无法执行 JavaScript，因此该漏洞的影响仅限于页面篡改、界面重绘（界面仿冒）以及强制加载外部资源。

CVSS 3.5 · Low EPSS 0.17% · P5

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown GutenKit < 2.5.1 affected
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I. Basic Information for CVE-2026-19698

Vulnerability Information
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Vulnerability Title
GutenKit < 2.5.1 - Contributor+ Stored CSS Injection
Source: CVE Program / CVE List V5
Vulnerability Description
The GutenKit WordPress plugin before 2.5.1 does not validate or escape style settings saved against a post before using them to build the CSS it outputs on the front end, allowing users with the Contributor role and above to inject arbitrary CSS into pages served to other users and to anonymous visitors. JavaScript execution is not possible at that role, so the impact is limited to defacement, interface redressing and forcing external resources to load.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N
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 GutenKit 0 ~ 2.5.1 -

II. Public POCs for CVE-2026-19698

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III. Intelligence Information for CVE-2026-19698

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Vendor Advisories for CVE-2026-19698 (1)

Same Patch Batch · Unknown · 2026-09-02 · 66 CVEs total

CVE-2026-4357 10.0 CRITICAL Embed HTML5 Game <= 1.3 - Unauthenticated Arbitrary File Upload
CVE-2026-77009 9.9 CRITICAL WatchMan-Site7 3.1.1 - 4.2.0 - Subscriber+ RCE via Debug Console
CVE-2025-9314 9.8 CRITICAL Developer Tools <= 1.1.3 – Unauthenticated Arbitrary File Upload
CVE-2025-15485 8.2 HIGH Auto x LINE <= 1.0.0 – Unauthenticated REST API Endpoints Call
CVE-2026-82884 6.8 MEDIUM All in One SEO < 5.0.0.1 - Contributor+ Stored XSS via ai-assistant Block
CVE-2026-83547 6.8 MEDIUM Xpro Elementor Addons 1.6.0 - 1.7.3 - Contributor+ Stored XSS via Multiple Widgets
CVE-2026-10821 6.6 MEDIUM Yoast SEO Premium < 27.6.1 - Author+ Arbitrary .htaccess Directive Injection to RCE
CVE-2026-2688 6.5 MEDIUM CM HIPAA Forms < 3.2.0 - Unauthenticated Authorization Bypass
CVE-2024-3773 5.9 MEDIUM LiveJournal Shortcode <= 1.1.1 - Contributor+ Stored XSS via Shortcode
CVE-2026-2811 5.4 MEDIUM Ajaxify Comments < 3.2 - Unauthenticated HTTP Header Injection
CVE-2026-8151 5.4 MEDIUM Simple Membership MailChimp Integration < 1.9.8 - API Key Update via CSRF
CVE-2026-78153 5.3 MEDIUM Restrict User Access 2.6 - 2.8 - Unauthenticated Content Protection Bypass via REST API Ro
CVE-2025-15489 5.3 MEDIUM Passster < 4.2.24 - Password Protection Bypass
CVE-2026-83533 5.3 MEDIUM WP Express Checkout < 2.4.9 - Unauthenticated Payment Bypass via wpec_process_payment
CVE-2025-15481 5.3 MEDIUM Notification Bar for WordPress <= 1.1.8 – Unauthenticated Subscriber Data Disclosure
CVE-2026-77794 5.3 MEDIUM RegistrationMagic 6.0.0.0 - 6.0.9.8 - Unauthenticated Payment Bypass via Zero Quantity
CVE-2026-77793 5.3 MEDIUM RegistrationMagic < 6.0.9.9 - Unauthenticated Payment Bypass via Omitted Price Field
CVE-2025-15490 5.3 MEDIUM Passster < 4.2.26 - Global Protection Bypass
CVE-2025-8945 5.3 MEDIUM Wp Edit Password Protected < 1.3.5 - Protection Bypass via REST API
CVE-2026-17563 5.3 MEDIUM WP User Frontend < 4.3.11 - Unauthenticated Post Creation via Subscription-Gated Form

Showing top 20 of 66 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: GutenKit
Same vendor: Unknown

V. Comments for CVE-2026-19698

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