CVE-2025-5940

Summary

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 Software

Weaknesses

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

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

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

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