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CVE-2026-16257— Arvow AI SEO Writer < 1.5.4 - Unauthenticated Arbitrary Post Creation via Webhook Secret Type-Juggling

Quick assessment

Affected
Unknown Arvow AI SEO Writer
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 Arvow AI SEO Writer是WordPress基金会开源的一款AI驱动的SEO内容创作插件。 WordPress Arvow AI SEO Writer 1.5.4之前版本存在安全漏洞，该漏洞源于对REST端点的访问控制不当，攻击者可通过类型 juggling 绕过访问控制，导致未认证用户能够创建任意文章和页面并泄露作者账户和分类信息。

AI Predicted 8.6 Difficulty: Easy EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Arvow AI SEO Writer < 1.5.4 affected
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I. Basic Information for CVE-2026-16257

Vulnerability Information
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Vulnerability Title
Arvow AI SEO Writer < 1.5.4 - Unauthenticated Arbitrary Post Creation via Webhook Secret Type-Juggling
Source: CVE Program / CVE List V5
Vulnerability Description
The Arvow AI SEO Writer WordPress plugin before 1.5.4 does not properly restrict access to one of its REST endpoints, whose only access control can be bypassed by unauthenticated users through type juggling when the Arvow AI SEO Writer WordPress plugin before 1.5.4 has not been configured, allowing them to create arbitrary posts and pages and to disclose author account and taxonomy information.
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
Vulnerability Title
WordPress Arvow AI SEO Writer 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Arvow AI SEO Writer是WordPress基金会开源的一款AI驱动的SEO内容创作插件。 WordPress Arvow AI SEO Writer 1.5.4之前版本存在安全漏洞，该漏洞源于对REST端点的访问控制不当，攻击者可通过类型 juggling 绕过访问控制，导致未认证用户能够创建任意文章和页面并泄露作者账户和分类信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Arvow AI SEO Writer 0 ~ 1.5.4 -

II. Public POCs for CVE-2026-16257

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III. Intelligence Information for CVE-2026-16257

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Vendor Advisories for CVE-2026-16257 (1)

Same Patch Batch · Unknown · 2026-08-10 · 48 CVEs total

CVE-2026-17020 Salon Booking System – Free Version <= 10.31.0 - Subscriber+ Arbitrary Booking PII Disclos
CVE-2026-17023 Salon Booking System – Free Version <= 10.30.33 - Unauthenticated Google Calendar Connecti
CVE-2026-18786 CheckView < 2.3.2 - Administrator Account Creation via REST API Authentication Bypass
CVE-2026-14293 Autopay / Blue Media for WooCommerce < 5.0.1 - Unauthenticated Stored XSS via CSS Editor
CVE-2026-19075 All-in-One Video Gallery < 4.9.2 - Subscriber+ Server-Side Request Forgery via 'vdl' Param
CVE-2026-19074 Advanced Classifieds & Directory Pro < 3.4.3 - Unauthenticated Non-Public Listing Custom F
CVE-2026-19089 Product Input Fields for WooCommerce < 2.0.2 - Unauthenticated Arbitrary File Upload
CVE-2026-19077 Copy & Delete Posts < 1.5.5 - Authenticated Arbitrary Post Deletion via Missing Object-Lev
CVE-2026-14238 Vitepos < 3.6.0 - Admin+ SQL Injection via product-details-report
CVE-2026-17021 Salon Booking System – Free Version < 10.30.34 - Unauthenticated Arbitrary Booking Total T
CVE-2026-17022 Salon Booking System – Free Version < 10.30.34 - Unauthenticated Booking Information Discl
CVE-2026-14211 Amelia Pro < 9.7 - Provider+ Arbitrary Customer Data Disclosure and Modification via IDOR
CVE-2026-19053 ProSolution WP Client < 2.0.6 - Unauthenticated Blind SQLi via 'jobID' Parameter
CVE-2026-19049 ProSolution WP Client < 2.0.9 - Unauthenticated SQLi and Plugin Data Deletion via 'removes
CVE-2026-18960 Block User Account < 2.0.1 - Subscriber+ Account Block Bypass via Application Passwords
CVE-2026-18946 Contact Form to Any API < 3.0.7 - Unauthenticated Sensitive File Disclosure via Predictabl
CVE-2026-18934 RSS Aggregator by Feedzy < 5.2.6 - Author+ Cross-User Import Job Manipulation and Post Del
CVE-2026-15229 Pinpoint Booking System <= 2.9.9.7.1 - Unauthenticated Arbitrary Booking Price Manipulatio
CVE-2026-16949 Term Pages < 2.0.0 - Unauthenticated SQL Injection via tp_lookup
CVE-2026-16985 Squeeze < 1.7.12 - Author+ Arbitrary File Upload

Showing top 20 of 48 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Arvow AI SEO Writer
Same vendor: Unknown

V. Comments for CVE-2026-16257

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