CVE-2025-5940

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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
WordfenceCNA
6.4 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 8%
VendorProductVersion
osompressosom_blocks
𝑥
< 1.2.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://plugins.trac.wordpress.org/browser/osomblocks/trunk/blocks/cpt-list/index.php#L171
https://wordpress.org/plugins/osomblocks/#developers
https://www.wordfence.com/threat-intel/vulnerabilities/id/54e022df-0dc7-4f60-811d-48a92b723d55?source=cve