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.
History

Mon, 03 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 03 Aug 2026 06:45:00 +0000

Type Values Removed Values Added
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.
Title Blog Floating Button <= 1.4.20 - Unauthenticated Stored XSS via User-Agent Header
References

cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published: 2026-08-03T06:00:12.685Z

Updated: 2026-08-03T17:05:08.786Z

Reserved: 2026-07-10T09:42:57.466Z

Link: CVE-2026-15383

cve-icon Vulnrichment

Updated: 2026-08-03T17:05:02.839Z

cve-icon NVD

No data.

cve-icon Redhat

No data.