CVE-2025-5940
Osom Blocks <= 1.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via class_name Parameter
- State
- Published
- Severity
- 6.4 Medium
- Published
- Jun 27, 2025
- Updated
- Apr 8, 2026
- Reserved
- Jun 9, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | Wordfence |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
Osom Blocksosompress |
|
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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