What’s Vulnerable › Vulnerabilities
CVE-2026-15383: Blog Floating Button <= 1.4.20 - Unauthenticated Stored XSS via User-Agent Header
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-03 · updated 2026-08-26
- Weakness: CWE-79
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.
Affected products
- Blog Floating Button: through 1.4.20
References
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