What is CVE-2026-4067?

CVE-2026-4067 is a medium-severity vulnerability in Nocaredev Ad Short, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-03-21.

How severe is CVE-2026-4067?

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

XSS in Nocaredev Ad Short

CVE-2026-4067

The Ad Short plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ad' shortcode's 'client' attribute in all versions up to and including 2.0.1. This is due to insufficient input sanitization and output escaping on the 'client' shortcode attribute. The ad_func() shortcode handler at line 71 accepts a 'client' attribute via shortcode_atts() and directly concatenates it into a double-quoted HTML attribute (data-ad-client) at line 130 without applying esc_attr() or any other sanitization. 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 (8.7th 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

Nocaredev Ad Short — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-4067?: CVE-2026-4067 is a medium-severity vulnerability in Nocaredev Ad Short, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-03-21.
How severe is CVE-2026-4067?: Medium severity. CVSS v3 base score is 6.4 out of 10.