CVE-2026-15383 — MEDIUM (6.1)

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.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-79

References

https://wpscan.com/vulnerability/45e5d74e-6f7b-499b-ae25-74fe1bc8d18d/

FAQ

What is CVE-2026-15383?

CVE-2026-15383 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 ...

How severe is CVE-2026-15383?

CVE-2026-15383 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-15383?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.