CVE-2026-104400
Received Received - Intake

Stored XSS in B Blocks b-blocks Plugin

Publication date: 2026-10-05

Last updated on: 2026-10-05

Assigner: Patchstack

Description
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.

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Meta Information

Published
2026-10-05
Last Modified
2026-10-05
Generated
2026-10-05
AI Q&A
2026-10-05
EPSS Evaluated
N/A
NVD
CVE-2026-104400
EUVD
EUVD-2026-92287

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
bplugins b_blocks to 2.1.8 (inc)
bplugins b_blocks From 2.1.0 (inc) to 2.1.8 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 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.

Attack-Flow Graph

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Executive Summary

This is a Stored Cross-Site Scripting (XSS) vulnerability in the B Blocks WordPress plugin. It allows attackers to inject malicious scripts into web pages by exploiting improper input neutralization during page generation. The vulnerability exists in versions 2.1.8 and earlier.

Detection Guidance

Detecting this vulnerability requires checking the installed version of the B Blocks plugin. Use commands like 'wp plugin list' in WordPress or inspect the plugin directory for version details. Look for versions 2.1.8 or earlier.

Impact Analysis

Attackers could inject malicious scripts to steal visitor data or hijack accounts. Successful exploitation requires a privileged user to interact with a malicious link, crafted page, or form submission. The impact includes data theft and account compromise.

Mitigation Strategies

Immediately update the B Blocks plugin to version 2.1.9 or later. If updating is not possible, consider disabling the plugin temporarily or seek help from your hosting provider or web developer.

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