PT-2026-39951 · WordPress · Next Date

Djaidja Moundjid · Published 2026-05-12 · Updated 2026-05-12 · CVE-2026-4920

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 Next Date plugin for WordPress versions prior to 1.1

Description The plugin is susceptible to Stored Cross-Site Scripting (XSS), a flaw where malicious scripts are permanently stored on the target server. This occurs due to insufficient input sanitization and output escaping of user-supplied attributes within the default shortcode attribute. 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. As a temporary workaround, restrict the use of the default attribute in shortcodes for users with contributor-level access.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-4920

Affected Products

Next Date

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-4920 · Security Note
• https://t.me/cveNotify/163225 · Telegram Post
• https://plugins.trac.wordpress.org/browser/nextdate/tags/1.0/nextdate.php#L37 · Note
• https://plugins.trac.wordpress.org/browser/nextdate/trunk/nextdate.php#L37 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/89e053ac-6ef9-4f5a-8aab-bdca40d68ab4?source=cve · Note