Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Network-accessible injection with no privileges; user interaction required for execution; scope change to browser context; limited C/I/A impacts consistent with reflected/stored XSS.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Unauthenticated Cross Site Scripting (XSS) in SiteGuard WP Plugin <= 1.8.6 versions.
AnalysisAI
Unauthenticated cross-site scripting in SiteGuard WP Plugin versions up to and including 1.8.6 allows a remote, unauthenticated attacker to inject arbitrary JavaScript that executes in the browser of a user who interacts with the crafted content. The changed scope (S:C in CVSS) indicates the injected script runs in the victim's browser security context rather than the server's, enabling session hijacking, credential theft, or unauthorized administrative actions on the WordPress site. No public exploit code and no CISA KEV listing have been identified at time of analysis.
Technical ContextAI
SiteGuard WP Plugin, developed by JP-Secure (CPE: cpe:2.3:a:jp-secure:siteguard_wp_plugin), is a WordPress plugin that provides login protection, CAPTCHA enforcement, and other hardening features for WordPress installations. The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), meaning user-supplied data is reflected or stored in HTML output without sufficient encoding or sanitization. Because the plugin operates in a WordPress environment (PHP/HTML), unsanitized input rendered into plugin-generated pages becomes executable JavaScript in any victim's browser. The changed scope in the CVSS vector confirms that the impact crosses the boundary from the WordPress application context into the victim's browser context.
RemediationAI
The primary remediation is to update SiteGuard WP Plugin to a version released after 1.8.6 via the WordPress plugin dashboard or by downloading directly from the plugin repository. No exact fixed version number was confirmed in the available Patchstack advisory data - administrators should verify the current latest release version exceeds 1.8.6 before applying. The Patchstack advisory is available at https://patchstack.com/database/wordpress/plugin/siteguard/vulnerability/wordpress-siteguard-wp-plugin-plugin-1-8-6-cross-site-scripting-xss-vulnerability. As a compensating control while patching is pending, consider restricting access to the affected plugin pages to trusted IP ranges using server-level rules (e.g., nginx allow/deny or Apache mod_authz_host), which reduces unauthenticated attacker reach at the cost of limiting legitimate remote access. Additionally, deploying a web application firewall (WAF) rule targeting script injection patterns in plugin request parameters can reduce exploitation likelihood without service disruption.
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-53960
GHSA-2pjv-rp2m-j233