Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.8%
CVSS Severity
CVSS v3 Score 6.4
References
Products affected by CVE-2025-5940
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cpe:2.3:a:osompress:osom_blocks:1.0
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cpe:2.3:a:osompress:osom_blocks:1.0.1
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cpe:2.3:a:osompress:osom_blocks:1.0.2
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cpe:2.3:a:osompress:osom_blocks:1.1
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cpe:2.3:a:osompress:osom_blocks:1.1.1
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cpe:2.3:a:osompress:osom_blocks:1.1.2
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cpe:2.3:a:osompress:osom_blocks:1.2
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cpe:2.3:a:osompress:osom_blocks:1.2.1