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CVE-2026-1886: Go Night Pro | WordPress Dark Mode Plugin <= 1.1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'margin' Shortcode Attribute

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-21 · updated 2026-06-17
• Weakness: CWE-79

Description

The Go Night Pro | WordPress Dark Mode Plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'go-night-pro-shortcode' shortcode in all versions up to, and including, 1.1.0 due to insufficient input sanitization and output escaping on the user-supplied 'margin' attribute. 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.

Affected products

• hrs2015 Go Night Pro | WordPress Dark Mode Plugin: through 1.1.0

References

• https://plugins.trac.wordpress.org/browser/go-night-pro/tags/1.1.0/admin/partials/shortcode/go-night-shortcode-display.php#L48
• https://plugins.trac.wordpress.org/browser/go-night-pro/tags/1.1.0/admin/partials/shortcode/go-night-shortcode-display.php#L61
• https://plugins.trac.wordpress.org/browser/go-night-pro/trunk/admin/partials/shortcode/go-night-shortcode-display.php#L48
• https://plugins.trac.wordpress.org/browser/go-night-pro/trunk/admin/partials/shortcode/go-night-shortcode-display.php#L61
• https://www.wordfence.com/threat-intel/vulnerabilities/id/4a75444e-b1e4-41e0-9209-07ded65c1498?source=cve

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