CVE-2026-3876
Received Received - Intake
Stored XSS in WordPress Prismatic Plugin via prismatic_encoded Shortcode

Publication date: 2026-04-16

Last updated on: 2026-04-16

Assigner: Wordfence

Description
The Prismatic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'prismatic_encoded' pseudo-shortcode in all versions up to, and including, 3.7.3. This is due to insufficient input sanitization and output escaping on user-supplied attributes within the 'prismatic_decode' function. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page by submitting a comment containing a crafted 'prismatic_encoded' pseudo-shortcode.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-04-16
Last Modified
2026-04-16
Generated
2026-06-16
AI Q&A
2026-04-16
EPSS Evaluated
2026-06-14
NVD
CVE-2026-3876
EUVD
EUVD-2026-23212
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
prismatic prismatic to 3.7.3 (inc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
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
AI Quick Actions
Instant insights powered by AI
Executive Summary

The Prismatic plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in all versions up to and including 3.7.3. This vulnerability arises because the plugin does not properly sanitize or escape user-supplied input within the 'prismatic_decode' function, specifically related to the 'prismatic_encoded' pseudo-shortcode.

An unauthenticated attacker can exploit this by submitting a comment containing a crafted 'prismatic_encoded' pseudo-shortcode that injects arbitrary web scripts. These scripts then execute whenever any user accesses the page containing the injected comment.

Impact Analysis

This vulnerability allows attackers to inject malicious scripts into web pages viewed by other users, potentially leading to theft of user credentials, session hijacking, or unauthorized actions performed on behalf of users.

Because the attack can be performed by unauthenticated users and affects all visitors to the injected page, it poses a significant security risk to website users and administrators.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-3876. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart