Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Network-accessible unauthenticated XSS with Changed scope; availability impact removed as XSS does not meaningfully disrupt service availability.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
2DescriptionCVE.org
Unauthenticated Cross Site Scripting (XSS) in WP Full Stripe Free <= 8.5.0 versions.
AnalysisAI
Unauthenticated stored or reflected Cross-Site Scripting in the WP Full Stripe Free WordPress plugin version 8.5.0 and below allows remote, unauthenticated attackers to inject arbitrary JavaScript into pages viewed by other users, including administrators. Because the vulnerability carries a Changed scope (S:C in the CVSS vector), successful exploitation can affect browser sessions beyond the vulnerable plugin's own context, enabling session hijacking, credential theft, or malicious redirects. No public exploit code or CISA KEV listing has been identified at time of analysis, but the unauthenticated attack surface makes this a meaningful risk for any WordPress site running the affected plugin.
Technical ContextAI
WP Full Stripe Free (CPE: cpe:2.3:a:themeisle:wp_full_stripe_free) is a WordPress payment plugin developed by Themeisle that integrates Stripe payment processing into WordPress sites. CWE-79 (Improper Neutralization of Input During Web Page Generation) indicates the root cause is insufficient sanitization or escaping of user-controlled input before it is rendered in an HTML context. The CVSS vector AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:A confirms network-accessible, low-complexity exploitation requiring only victim user interaction (such as visiting a crafted URL or page), with scope change indicating the injected script executes in a different security context than the vulnerable component itself - a classic reflected or stored XSS pattern in a WordPress plugin.
RemediationAI
Update WP Full Stripe Free to the first version released after 8.5.0, which Patchstack indicates contains the fix; consult the advisory at https://patchstack.com/database/wordpress/plugin/wp-full-stripe-free/vulnerability/wordpress-wp-full-stripe-free-plugin-8-5-0-cross-site-scripting-xss-vulnerability for the exact patched version number. If an immediate upgrade is not possible, consider temporarily deactivating the plugin to eliminate the attack surface, accepting the trade-off of losing Stripe payment functionality on the site. A Web Application Firewall (WAF) with XSS rules - such as those provided by Wordfence or Patchstack's own virtual patching feature - can provide a compensating control, though WAF bypass remains possible for sophisticated attackers. Restricting access to plugin-rendered endpoints via IP allowlist is not practical for public-facing payment forms.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-57968
GHSA-m4ff-rp67-jh94