Vulnerability Description
The WM JqMath plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'style' shortcode attribute of the [jqmath] shortcode in all versions up to and including 1.3. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. The generate_jqMathFormula() function directly concatenates the 'style' attribute value into an HTML style attribute without applying esc_attr() or any other 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/wm-jqmath/tags/1.3/wm_jqmath.php#L27
- https://plugins.trac.wordpress.org/browser/wm-jqmath/tags/1.3/wm_jqmath.php#L33
- https://plugins.trac.wordpress.org/browser/wm-jqmath/trunk/wm_jqmath.php#L27
- https://plugins.trac.wordpress.org/browser/wm-jqmath/trunk/wm_jqmath.php#L33
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b4aebb45-b47b-4b5a-828
FAQ
What is CVE-2026-3998?
CVE-2026-3998 is a vulnerability with a CVSS score of 6.4 (MEDIUM). The WM JqMath plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'style' shortcode attribute of the [jqmath] shortcode in all versions up to and including 1.3. This is due to in...
How severe is CVE-2026-3998?
CVE-2026-3998 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-3998?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.