PT-2026-33278 · WordPress · Prismatic

Athiwat Tiprasaharn · Published 2026-04-16 · Updated 2026-04-24 · CVE-2026-3876

Positive Technologies (AI Summary)

CVSS v3.1

7.2

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Prismatic versions prior to 3.7.4

Description The Prismatic plugin for WordPress contains a Stored Cross-Site Scripting issue. This occurs due to insufficient input sanitization and output escaping on user-supplied attributes within the prismatic decode() function. Unauthenticated attackers can inject arbitrary web scripts into pages by submitting a comment containing a crafted 'prismatic encoded' pseudo-shortcode, which then execute when a user accesses the affected page.

Recommendations Update to a version newer than 3.7.3. As a temporary workaround, restrict the use of the 'prismatic encoded' pseudo-shortcode in user comments.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-3876

Affected Products

Prismatic

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-3876 · Security Note
• https://twitter.com/CVEnew/status/2044701553303720385 · Twitter Post
• https://plugins.trac.wordpress.org/changeset?old_path=/prismatic/tags/3.7.3/inc/prismatic-core.php&new_path=/prismatic/tags/3.7.4/inc/prismatic-core.php · Note
• https://twitter.com/giuseppe_1337/status/2047471906945729007 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2044740822768263174 · Twitter Post
• https://wordfence.com/threat-intel/vulnerabilities/id/aa4e18b0-f871-4476-af92-42e55aabdf93?source=cve · Note