CVE-2026-8981

Published: Jun 9, 2026Modified: Jun 17, 2026Deferred

3.5

Vector

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

Exploitability: 0.9 / Impact: 2.5

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

The Custom Block Builder WordPress plugin before 4.3.0 does not consistently check the unfiltered_html capability across all paths that write to its block template code fields, allowing administrators on multisite installations (or single-site installs with DISALLOW_UNFILTERED_HTML defined) to inject arbitrary JavaScript that executes for any visitor of pages embedding the affected block.

Related CWEs

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (1)

https://wpscan.com/vulnerability/9815b0e6-e411-4a5c-9c63-30bad21da698/

Source: contact@wpscan.com

Timeline

No history available yet.