What is CVE-2026-3998?

CVE-2026-3998 is a medium-severity vulnerability in Webmindpt Wm Jqmath, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-15.

How severe is CVE-2026-3998?

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

XSS in Webmindpt Wm Jqmath

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. 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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (18.3th 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

Webmindpt Wm Jqmath — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-3998?: CVE-2026-3998 is a medium-severity vulnerability in Webmindpt Wm Jqmath, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-15.
How severe is CVE-2026-3998?: Medium severity. CVSS v3 base score is 6.4 out of 10.