CVE-2026-15726

medium

Description

The Serious Slider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'theme' Shortcode Attribute in all versions up to, and including, 1.4.0 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.

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/c8f45054-e6a4-403b-94eb-2dd2a4840c22?source=cve

https://plugins.trac.wordpress.org/changeset?reponame=&old=3640247%40cryout-serious-slider&new=3640247%40cryout-serious-slider

https://plugins.trac.wordpress.org/browser/cryout-serious-slider/tags/1.4.0/inc/shortcodes.php#L55

https://plugins.trac.wordpress.org/browser/cryout-serious-slider/tags/1.4.0/inc/shortcodes.php#L244

https://plugins.trac.wordpress.org/browser/cryout-serious-slider/tags/1.4.0/inc/shortcodes.php#L111

https://plugins.trac.wordpress.org/browser/cryout-serious-slider/tags/1.4.0/inc/shortcodes.php#L102

Details

Source: Mitre, NVD

Published: 2026-08-16

Updated: 2026-08-16

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00201