Advance Block Extend <= 1.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via TitleColor Block Attribute

2026-02-18 15:53

Athiwat Tiprasaharn (Jitlada)

Strategic Overview

Status

Unpatched

Affected PluginAdvance Block Extend

Affected Version<= 1.0.4

CVSS6.4Medium

CVECVE-2026-1646

View all Advance Block Extend vulnerabilities

Vulnerability Overview

The Advance Block Extend plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the TitleColor block attribute in the Latest Posts Gutenberg block in all versions up to, and including, 1.0.4 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.

Technical Analysis

REMEDIATION: No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement. --- IDENTIFIER: 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.

External References

https://www.cve.org/CVERecord?id=CVE-2026-1646 https://www.wordfence.com/threat-intel/vulnerabilities/id/3218716a-cce6-4ce7-a6be-4e146e0a6d53

CVSS Vector

6.4

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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