Stored Cross-Site Scripting Vulnerability in Prismatic Plugin for WordPress
CVE-2026-3876

7.2HIGH

Key Information:

Vendor

WordPress
Status
Prismatic
Vendor
CVE Published:
16 April 2026

What is CVE-2026-3876?

The Prismatic plugin for WordPress has a vulnerability that allows unauthenticated attackers to exploit Stored Cross-Site Scripting through the 'prismatic_encoded' pseudo-shortcode. This flaw exists due to a lack of adequate input sanitization and output escaping in the 'prismatic_decode' function, enabling attackers to insert malicious scripts into comments. When a user accesses a page containing such an injected comment, the script executes, leading to potential data theft, session hijacking, or other malicious activities. Users of all versions up to 3.7.3 are advised to upgrade to the latest version to mitigate this security issue.

Affected Version(s)

Prismatic 0 <= 3.7.3

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset?old_path=/pr...

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Athiwat Tiprasaharn
.