Osom Blocks

Osom Blocks has one disclosed vulnerability in the WordSec catalog, all reported in 2025; it is fixed as of September 2026. Their average CVSS score is 6.4, and the most serious one scores 6.4 out of 10.

The most common weakness is Cross-Site Scripting, behind 1 of the records (100%).

The one issue recorded for Osom Blocks has a vendor fix available, so running the current release closes it.

All of these findings were reported by Peter Thaleikis. Osom Blocks is installed on roughly 100 WordPress sites, so each unpatched flaw has a wide blast radius. The current release is tested up to WordPress 6.9.7.

Strategic Overview

Avg CVSSMedium

6.4/ 10

Patch Coverage100%

Open

Fixed

Get automatic notifications for all Osom Blocks vulnerabilities before they are exploited.

Highest severity on recordCVSS 6.4CVE-2025-5940

Osom Blocks <= 1.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via class_name Parameter

Read the full analysis

Vulnerability Records

1 records


2025-06-26 19:06	Osom Blocks <= 1.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via class_name Parameter Osom Blocks <= 1.2.1	`CVE-2025-5940`	6.4 Medium	Peter Thaleikis	Yes

Showing 1–1 of 1 reports

Latestv1.2.2

Osom Blocks

Author

OsomPress

5.0(5)

100/100

Last Updated

2025-12-16 (9mo ago)

Active Installs

100+

Downloads

4,919

Requires WP

5.3+

Requires PHP

5.6+

Tested up to

WP 6.9.7

Created

2020-10-04 (6y ago)

Osom Blocks is a block to list Custom Post Types, ideally to use with OsomPress themes. With Osom Custom Post Type Block you can display a list of CPT entries and customize: 1. The Custom Post Type. 2. Number of posts. 3. Display/hide the featured image. 4. Display/hide the excerpt. 5. Choose grid display 6. Choose the number of columns for the grid layout 7. Choose the title HTML markup (H2, H3 or H4). 8. Customize the “read more” text. 9. Display/hide parent post/pages (only in hierarchical Custom Post Types). 10. Display/hide pagination. Deprecation Notice Important: We want to inform you that the plugin will be deprecated in future releases. For new sites we highly encourage you use the native query loop block, which now supports listing of Custom Post Types seamlessly. We appreciate your understanding.

View on WordPress.org