What is CVE-2025-8427?

CVE-2025-8427 is a medium-severity vulnerability in Fastlinemedia Beaver Builder, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-10-23.

How severe is CVE-2025-8427?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Fastlinemedia Beaver Builder

CVE-2025-8427

The Beaver Builder Plugin (Starter Version) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘auto_play’ parameter in all versions up to, and including, 2.9.2.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (6.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Fastlinemedia Beaver_builder
The Beaver Builder Team Plugin (Starter Version) — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@wordfence.com (Product, Third Party Advisory)
security@wordfence.com (Release Notes)

Frequently asked questions

What is CVE-2025-8427?: CVE-2025-8427 is a medium-severity vulnerability in Fastlinemedia Beaver Builder, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-10-23.
How severe is CVE-2025-8427?: Medium severity. CVSS v3 base score is 6.4 out of 10.