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CVE-2026-15383— Blog Floating Button <= 1.4.20 - Unauthenticated Stored XSS via User-Agent Header

Quick assessment

Affected
Unknown Blog Floating Button
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 Blog Floating Button是WordPress基金会开源的一款为博客添加悬浮按钮的组件。 WordPress Blog Floating Button 1.4.20及之前版本存在安全漏洞，该漏洞源于未清理或转义访问者的User-Agent标头，该标头通过未经身份验证的跟踪REST端点存储，并在管理员报告页面未转义渲染，可能导致未经身份验证的攻击者存储恶意脚本，在查看访问报告的管理员会话中执行，从而接管站点。

AI Predicted 9.8 Difficulty: Easy EPSS 0.27% · P18

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Blog Floating Button ≤ 1.4.20 affected
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I. Basic Information for CVE-2026-15383

Vulnerability Information
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Vulnerability Title
Blog Floating Button <= 1.4.20 - Unauthenticated Stored XSS via User-Agent Header
Source: CVE Program / CVE List V5
Vulnerability Description
The Blog Floating Button WordPress plugin through 1.4.20 does not sanitize or escape the visitor User-Agent header, which it stores through an unauthenticated tracking REST endpoint and later renders unescaped in an administrator report page. This allows an unauthenticated attacker to store a malicious script that executes in the session of any administrator who views the access report, leading to 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
Vulnerability Title
WordPress Blog Floating Button 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Blog Floating Button是WordPress基金会开源的一款为博客添加悬浮按钮的组件。 WordPress Blog Floating Button 1.4.20及之前版本存在安全漏洞，该漏洞源于未清理或转义访问者的User-Agent标头，该标头通过未经身份验证的跟踪REST端点存储，并在管理员报告页面未转义渲染，可能导致未经身份验证的攻击者存储恶意脚本，在查看访问报告的管理员会话中执行，从而接管站点。
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 Blog Floating Button 0 ~ 1.4.20 -

II. Public POCs for CVE-2026-15383

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III. Intelligence Information for CVE-2026-15383

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Vendor Advisories for CVE-2026-15383 (1)

Same Patch Batch · Unknown · 2026-08-03 · 27 CVEs total

CVE-2026-15231 TaxoPress < 3.51.0 - Contributor+ Private Post Disclosure via IDOR
CVE-2026-16057 Contest Gallery < 30.0.7 - Author+ Arbitrary Post Deletion via post_cg_youtube_delete_from
CVE-2026-16274 Classified Listing < 5.4.4 - Contributor+ Unpublished Post Content Disclosure via rtcl_blo
CVE-2026-15254 Simply Schedule Appointments < 1.6.12.11 - Contributor+ Sensitive Data Disclosure via Admi
CVE-2025-15672 Chama < 1.0.13 - Unauthenticated PHP Object Injection
CVE-2025-15673 Import and export users and customers < 2.4.3 - Admin+ Arbitrary File Read
CVE-2026-16532 Link Library < 7.9.3 - Unauthenticated SQL Injection via the Front-End Link Submission For
CVE-2026-16534 Import and export users and customers < 2.4.2 - Custom Role Privilege Escalation to Admini
CVE-2026-16276 Classified Listing < 5.4.4 - Contributor+ Store Revenue Total Disclosure via rtcl_revenue_
CVE-2026-13340 SVG Support < 2.5.17 - Author+ Stored XSS via .svgz Sanitization Bypass
CVE-2026-12872 Webinfos <= 1.2 - Unauthenticated Arbitrary File Upload
CVE-2026-12965 Super Store Finder < 7.11 - Unauthenticated SQL Injection via ssf_tracking
CVE-2026-14557 SoftMarket <= 1.0.0 - Unauthenticated Account Takeover via Email Verification Bypass
CVE-2026-16565 Dokan < 5.0.9 - Vendor+ Cross-Vendor Product Attribute Modification via Product Attribute
CVE-2026-16060 Insert or Embed Articulate Content into WordPress <= 4.3000000027 - Editor+ Arbitrary File
CVE-2026-16250 Personal QR Message <= 1.0 - Unauthenticated Arbitrary File Upload
CVE-2026-15260 Geo My WP < 4.5.5.3 - Subscriber+ Arbitrary Geolocation Record Modification and Deletion v
CVE-2026-15931 Simple Membership < 4.7.8 - Unauthenticated Stored XSS via PayPal Subscription Subscriber
CVE-2026-15930 Simple Membership < 4.7.8 - Unauthenticated Administrator Account Takeover via Registratio
CVE-2026-16539 SM Page Duplicator <= 1.0.0 - Editor+ SQL Injection via Page Duplication

Showing top 20 of 27 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Blog Floating Button
Same vendor: Unknown

V. Comments for CVE-2026-15383

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