EUVD-2026-31024
GHSA-rxxc-xr9w-xfp5
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
1DescriptionCVE.org
The SponsorMe plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via PHP_SELF Parameter in all versions up to, and including, 0.5.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The PHP_SELF value is reflected in two separate locations within the vulnerable function - a form action attribute and an anchor href attribute - both of which can be exploited by appending a crafted payload to the wp-admin/admin.php URL path.
AnalysisAI
Reflected Cross-Site Scripting in the SponsorMe plugin for WordPress (all versions through 0.5.2) allows unauthenticated attackers to execute arbitrary JavaScript in a victim's browser by tricking an authenticated user - likely a WordPress administrator - into clicking a specially crafted wp-admin/admin.php URL. The PHP_SELF superglobal is reflected unsanitized in two distinct locations within the same vulnerable function: a form action attribute (sponsorme.php:440) and an anchor href attribute (sponsorme.php:475), doubling the attack surface. No patch has been identified at time of analysis, and no public exploit or CISA KEV listing has been confirmed.
Technical ContextAI
The affected component is the SponsorMe WordPress plugin authored by owencutajar (CPE: cpe:2.3:a:owencutajar:sponsorme:*:*:*:*:*:*:*:*). The root cause is CWE-79 (Improper Neutralization of Input During Web Page Generation), specifically a failure to sanitize or encode the PHP superglobal $_SERVER['PHP_SELF'] before embedding it into HTML output. In PHP, PHP_SELF contains the filename of the currently executing script including the URL path, meaning an attacker can append characters - including URL-encoded XSS payloads - directly to the request path and have them reflected verbatim into the rendered HTML. The Wordfence disclosure identifies two reflection sinks in sponsorme.php: line 440 (form action attribute) and line 475 (anchor href attribute), both within the same function. Because href and action attributes can execute JavaScript via schemes like javascript: or via event handler injection when improperly encoded, both sinks present viable XSS vectors. The CVSS Scope value of Changed (S:C) confirms the vulnerability crosses the security boundary from the WordPress plugin into the victim's browser context.
RemediationAI
No vendor-released patch has been identified at time of analysis. The primary recommended action is to deactivate and remove the SponsorMe plugin from all WordPress installations until a patched version is released or the vendor confirms a fix. Disabling the plugin eliminates all attack surface with no functional side effect beyond loss of the sponsorship feature. As a compensating control if the plugin cannot be removed, restrict access to wp-admin/admin.php via web server rules (e.g., Apache .htaccess IP allowlisting or nginx geo-restriction) to limit who can be tricked into loading the vulnerable endpoint - note this adds administrative overhead and does not patch the underlying flaw. Web Application Firewalls (WAF) with XSS ruleset signatures, such as the Wordfence WAF for WordPress, can detect and block known PHP_SELF XSS payload patterns but should be treated as defense-in-depth rather than a primary fix. Monitor the Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/7df7f541-b8aa-46fa-bfca-b333beea27f9?source=cve and the WordPress plugin repository for patch availability.
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External POC / Exploit Code
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