CVE-2025-5940

Description

The Osom Blocks – Custom Post Type listing block plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘class_name’ parameter in all versions up to, and including, 1.2.1 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.

PUBLISHED Reserved 2025-06-09 | Published 2025-06-27 | Updated 2026-04-08 | Assigner Wordfence

Problem types

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

Product status

Timeline

Credits

Peter Thaleikis finder

References

www.wordfence.com/...-0dc7-4f60-811d-48a92b723d55?source=cve

plugins.trac.wordpress.org/...runk/blocks/cpt-list/index.php

wordpress.org/plugins/osomblocks/

plugins.trac.wordpress.org/...omblocks&sfp_email=&sfph_mail=

cve.org (CVE-2025-5940)

nvd.nist.gov (CVE-2025-5940)

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