Medium severity6.4NVD Advisory· Published Jun 27, 2025· Updated Apr 8, 2026

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.

Affected products

Osompress/Osom Blocks
cpe:2.3:a:osompress:osom_blocks:*:*:*:*:*:wordpress:*:*
Range: <1.2.2

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.wordfence.com/threat-intel/vulnerabilities/id/54e022df-0dc7-4f60-811d-48a92b723d55nvdThird Party Advisory
plugins.trac.wordpress.org/browser/osomblocks/trunk/blocks/cpt-list/index.phpnvdProduct
wordpress.org/plugins/osomblocks/nvdProduct
plugins.trac.wordpress.org/changesetnvd

News mentions

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cvss	0.416
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000