Vulnerability · Published Aug 28, 2026 · Assigned by Wordfence

CVE-2026-15798Smart Slider 3 <= 3.5.1.38 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'slider' Block Attribute

Medium 6.4

In plain English

A medium-severity cross-site scripting in Smart Slider 3 from nextendweb. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)0.4%top 64.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The Smart Slider 3 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'slider' Block Attribute in all versions up to, and including, 3.5.1.38 due to insufficient input sanitization and output 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. The injected scripts execute specifically when a user opens the affected post in the WordPress block editor, making Editors and Administrators the primary targets.

Affected products (as reported)

Vendor	Product	Versions
nextendweb	Smart Slider 3	0 – through 3.5.1.38

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References