CVE-2026-15383

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

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

EPSS

0.17% chance of exploitation in the next 30 days, 7th percentile

Published

2026-08-03

Proof-of-concept exploits (1)

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

References

• CVE Record
• NVD entry

Related

• CVE-2026-15382
• CVE-2026-15384
• CVE-2026-15381
• CVE-2026-15385
• CVE-2026-15377
• CVE-2026-15386