Is CVE-2026-3997 actively exploited?

No active exploitation of CVE-2026-3997 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3997 be exploited remotely?

Yes. CVE-2026-3997 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3997?

CVE-2026-3997 has a CVSS score of 6.4 (MEDIUM).

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MEDIUM

CVE-2026-3997

CWE-79Published: March 21, 2026· Updated: Mar 23, 2026

6.4

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:17.5th

Official Description

The Text Toggle plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'title' shortcode attribute of the [tt_part] and [tt] shortcodes in all versions up to and including 1.1. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. Specifically, in the avp_texttoggle_part_shortcode() function, the 'title' attribute is extracted from shortcode attributes and concatenated directly into HTML output without any escaping — both within an HTML attribute context (title="...") on line 116 and in HTML content on line 119. While the 'class' attribute is properly validated using ctype_alnum(), the 'title' attribute has no sanitization whatsoever. An attacker can inject double-quote characters to break out of the title attribute and inject arbitrary HTML attributes including event handlers. 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.

NVD Source

Technical Analysis

CVE-2026-3997 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.