CVE-2026-15383: CWE-79 Cross-Site Scripting (XSS) in Blog Floating Button
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.
AI Analysis
Technical Summary
CVE-2026-15383 is a stored cross-site scripting vulnerability in the Blog Floating Button WordPress plugin through version 1.4.20. The plugin does not properly sanitize or escape the User-Agent HTTP header submitted by visitors. This header is stored through an unauthenticated REST endpoint used for tracking and is later displayed without escaping in an administrator report page. An attacker can exploit this by sending a specially crafted User-Agent header containing malicious JavaScript, which will execute in the browser of any administrator who views the report, potentially allowing full site compromise.
Potential Impact
An unauthenticated attacker can inject malicious scripts that execute in the browser session of an administrator viewing the access report page. This can lead to site takeover, including unauthorized actions performed with administrator privileges.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the affected report page to trusted administrators only and consider disabling the vulnerable plugin if possible.
CVE-2026-15383: CWE-79 Cross-Site Scripting (XSS) in Blog Floating Button
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.
CVSS v3.1
Score 6.1medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-15383 is a stored cross-site scripting vulnerability in the Blog Floating Button WordPress plugin through version 1.4.20. The plugin does not properly sanitize or escape the User-Agent HTTP header submitted by visitors. This header is stored through an unauthenticated REST endpoint used for tracking and is later displayed without escaping in an administrator report page. An attacker can exploit this by sending a specially crafted User-Agent header containing malicious JavaScript, which will execute in the browser of any administrator who views the report, potentially allowing full site compromise.
Potential Impact
An unauthenticated attacker can inject malicious scripts that execute in the browser session of an administrator viewing the access report page. This can lead to site takeover, including unauthorized actions performed with administrator privileges.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the affected report page to trusted administrators only and consider disabling the vulnerable plugin if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-07-10T09:42:57.466Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a70364dbf32cb7a34182925
Added to database: 08/03/2026, 06:33:49 UTC
Last enriched: 08/03/2026, 07:07:19 UTC
Last updated: 08/04/2026, 01:36:04 UTC
Views: 6
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