CVE-2026-104400 PUBLISHED

WordPress B Blocks plugin <= 2.1.8 - Cross Site Scripting (XSS) vulnerability

Assigner: Patchstack
Reserved: 02.10.2026 Published: 05.10.2026 Updated: 05.10.2026

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins B Blocks b-blocks allows Stored XSS.This issue affects B Blocks: from n/a through 2.1.8.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CVSS Score: 6.5

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	bPlugins
Product	B Blocks
Versions	Default: unaffected affected from 0 to 2.1.8 (incl.)

Solutions

Update the WordPress B Blocks plugin to the latest available version (at least 2.1.9).

Credits

V1T | Patchstack Bug Bounty Program finder

References

https://patchstack.com/database/wordpress/plugin/b-blocks/vulnerability/wordpress-b-blocks-plugin-2-1-8-cross-site-scripting-xss-vulnerability?_s_id=cve

Problem Types

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

Impacts

Stored XSS