CVE-2026-1098
CM CSS Columns <= 1.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tag' Shortcode Attribute
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
The CM CSS Columns plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tag' shortcode attribute in all versions up to, and including, 1.2.1 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
| CWE | CWE-79 |
| Vendor | codemacher |
| Product | cm css columns |
| Published | Jan 24, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
codemacher / CM CSS Columns
0 ≤ 1.2.1
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/dabcc606-04ab-4fb0-bf3c-d3ad915b8904?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cm-css-columns/trunk/includes/Shortcoder.php#L109 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cm-css-columns/tags/1.2.1/includes/Shortcoder.php#L109
Credits
Youcef Hamdani