What is CVE-2026-1098?

CVE-2026-1098 is a medium-severity vulnerability in Codemacher Cm CSS Columns, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-01-24.

How severe is CVE-2026-1098?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Codemacher Cm CSS Columns

CVE-2026-1098

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (8.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Codemacher Cm Css Columns — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-1098?: CVE-2026-1098 is a medium-severity vulnerability in Codemacher Cm CSS Columns, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-01-24.
How severe is CVE-2026-1098?: Medium severity. CVSS v3 base score is 6.4 out of 10.