CVE-2026-3998
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.
Does this matter?
Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 6.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- EPSS
- 0.27% probability · 18th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Source
- security@wordfence.com
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-8281-400a4b786689?source=cve
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.