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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.

PUBLISHED Reserved 2026-03-10 | Published 2026-04-16 | Updated 2026-04-16 | Assigner Wordfence




HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

Any version
affected

Timeline

2026-03-26:Discovered
2026-03-10:Vendor Notified
2026-04-15:Disclosed

Credits

Athiwat Tiprasaharn finder

References

www.wordfence.com/...-f871-4476-af92-42e55aabdf93?source=cve

plugins.trac.wordpress.org/...s/3.7.4/inc/prismatic-core.php

cve.org (CVE-2026-3876)

nvd.nist.gov (CVE-2026-3876)

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