PT-2026-39950 · WordPress · Sp Blog Designer

Djaidja Moundjid · Published 2026-05-12 · Updated 2026-05-12 · CVE-2026-4859

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions SP Blog Designer versions prior to 1.0.1

Description The SP Blog Designer plugin for WordPress contains a Stored Cross-Site Scripting issue. This occurs due to insufficient input sanitization and output escaping within the 'design' attribute of the wpsbd post carousel shortcode. Authenticated attackers with Contributor-level access or higher can inject arbitrary web scripts into pages, which then execute when a user visits the affected page.

Recommendations Update the plugin to a version later than 1.0.0. As a temporary workaround, restrict the use of the wpsbd post carousel shortcode or its design attribute for users with Contributor-level access.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-4859

Affected Products

Sp Blog Designer

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-4859 · Security Note
• https://plugins.trac.wordpress.org/browser/sp-blog-designer/trunk/includes/shortcode/wpsbd-post-carousel.php#L156 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/705b1da0-df92-40c2-a608-ccad32a9c224?source=cve · Note
• https://plugins.trac.wordpress.org/browser/sp-blog-designer/tags/1.0.0/includes/shortcode/wpsbd-post-carousel.php#L156 · Note
• https://t.me/cveNotify/163224 · Telegram Post