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CVE-2025-5940

MEDIUM 5.4 CVSS 3.1
Published
June 27, 2025
Last modified
June 17, 2026
NVD status
Modified
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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 WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • osompress Osom Blocks — Up to and including 1.2.1
  • osompress osom_blocks — Before 1.2.2

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/osomblocks/trunk/blocks/cpt-list/index.php#L171 Product
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3320673%40osomblocks&new=3320673%40osomblocks&sfp_email=&sfph_mail=
  • wordpress.org https://wordpress.org/plugins/osomblocks/#developers Product
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/54e022df-0dc7-4f60-811d-48a92b723d55?source=cve Third Party Advisory
  • nvd.nist.gov Official NVD record