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CVE-2026-111958— Royal MCP < 1.5.7 - Authentication Bypass via Preview Link Token

Quick assessment

Affected
Unknown Royal MCP
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.

在版本 1.5.7 之前的 Royal MCP WordPress 插件未将预览链接令牌限制为仅用于其生成的单次预览。因此，任何获取到有效令牌的方都将被认证为令牌的拥有者（在默认配置下为管理员），并可在无需 nonce 的情况下通过整个 REST API 进行操作，从而导致网站被完全接管。

AI Predicted 9.8 Difficulty: Trivial
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I. Basic Information for CVE-2026-111958

Vulnerability Information
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Vulnerability Title
Royal MCP < 1.5.7 - Authentication Bypass via Preview Link Token
Source: CVE Program / CVE List V5
Vulnerability Description
The Royal MCP WordPress plugin before 1.5.7 does not limit a preview-link token to the single preview it was issued for, so any party that obtains a valid token is authenticated as the token's owning user, an administrator in the default configuration, across the entire REST API with no nonce, leading to full site takeover.
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 Royal MCP 0 ~ 1.5.7 -

II. Public POCs for CVE-2026-111958

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III. Intelligence Information for CVE-2026-111958

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Other References for CVE-2026-111958 (1)

Same Patch Batch · Unknown · 2026-10-22 · 13 CVEs total

CVE-2026-97328 WebP Express < 0.25.16 - Unauthenticated Stored XSS via Alter HTML Parser
CVE-2026-88849 MasterStudy LMS 3.7.13 - 3.7.54 - Instructor+ Arbitrary User Display Name Update via Stude
CVE-2026-111971 Photo Engine < 6.5.8 - Author+ Stored XSS via Collection Name
CVE-2026-111972 Photo Engine < 6.5.8 - Author+ Arbitrary Attachment Deletion via IDOR
CVE-2026-78392 Link Library < 7.9.6 - Contributor+ Stored XSS via 'link_target' Parameter
CVE-2026-110011 MB Custom Post Types & Custom Taxonomies 2.4.0 - 2.12.2 - Contributor+ Post Type Definitio
CVE-2026-110010 MB Custom Post Types & Custom Taxonomies 2.0.2 - 2.12.2 - Unauthenticated Settings Reset v
CVE-2026-103234 WP Ultimate Review < 2.4.5 - Unauthenticated Arbitrary Shortcode Execution via Reviewer Em
CVE-2026-100142 FluentCart < 2.2.0 - Unauthenticated Customer Address Disclosure via IDOR
CVE-2026-109931 Infility Global < 2.16.25 - Unauthenticated Google Translate API Key Update
CVE-2026-109927 CM HIPAA Forms < 3.3.2 - hipaa_forms+ Privilege Escalation via cm_hipaa_update_user_role
CVE-2026-109987 PixelYourSite (Free & Pro) - Unauthenticated Stored XSS via Cookie

IV. Related Vulnerabilities

Same product: Royal MCP
Same vendor: Unknown

V. Comments for CVE-2026-111958

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