CVE-2025-22525 Overview
CVE-2025-22525 is a stored cross-site scripting (XSS) vulnerability in the Donation Block For PayPal WordPress plugin developed by Bharat Kambariya. The flaw affects all plugin versions up to and including 2.2.0. It stems from improper neutralization of user-supplied input during web page generation [CWE-79]. An authenticated attacker with low privileges can inject persistent JavaScript payloads that execute in the browsers of site visitors and administrators. The issue requires user interaction and can cross security boundaries, resulting in limited impact to confidentiality, integrity, and availability across the affected WordPress site.
Critical Impact
Authenticated contributors can store malicious scripts that execute in administrator sessions, enabling session theft, defacement, and further compromise of the WordPress site.
Affected Products
- Donation Block For PayPal (donations-block) versions up to and including 2.2.0
- WordPress installations with the vulnerable plugin activated
- Any site accepting PayPal donations through this plugin
Discovery Timeline
- 2025-01-07 - CVE-2025-22525 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-22525
Vulnerability Analysis
The Donation Block For PayPal plugin fails to sanitize and escape user-controllable input before rendering it inside HTML pages. This omission allows an authenticated user with contributor-level access or higher to inject arbitrary HTML and JavaScript into stored plugin content. When another user, including a site administrator, views a page containing the injected payload, the browser executes the attacker's script within the site's origin.
Stored XSS in a WordPress donation plugin is particularly useful to attackers because donation-related pages typically receive traffic from both visitors and privileged users. Payload execution in an administrator session can trigger account takeover, plugin manipulation, or the addition of rogue admin users through the WordPress REST API.
Root Cause
The root cause is missing output encoding when the plugin renders donation block attributes or fields. The plugin does not apply WordPress escaping functions such as esc_html(), esc_attr(), or wp_kses_post() on attacker-supplied values. As a result, <script> tags and event handler attributes are preserved verbatim in the generated HTML.
Attack Vector
Exploitation requires an authenticated account with permission to edit posts or pages using the vulnerable block. The attacker inserts a crafted payload into a block attribute or donation field. The payload persists in the WordPress database. When any user renders the containing page, the browser interprets the injected content as executable script. The scope change indicates the payload can affect resources beyond the vulnerable component, such as adjacent iframes or subdomains.
For technical specifics, see the Patchstack XSS Vulnerability Advisory.
Detection Methods for CVE-2025-22525
Indicators of Compromise
- Unexpected <script> tags, on* event handlers, or javascript: URIs stored in wp_posts or plugin option tables
- New administrator accounts created without a corresponding audit-log entry
- Outbound browser requests from /wp-admin/ pages to attacker-controlled domains
- Modified plugin or theme files following an administrator visit to donation pages
Detection Strategies
- Query the WordPress database for donation block content containing HTML tags or JavaScript keywords
- Inspect page source of donation-enabled posts for script tags outside expected block markup
- Deploy a Content Security Policy (CSP) in report-only mode to surface script execution violations
- Enable WordPress audit logging to correlate contributor edits with administrator session anomalies
Monitoring Recommendations
- Monitor authenticated POST requests to /wp-json/wp/v2/blocks and post-edit endpoints from low-privilege accounts
- Alert on browser console errors and CSP violations sourced from donation pages
- Track file integrity of WordPress core, plugin, and theme directories
- Review web server access logs for referrer patterns matching donation URLs followed by admin-area activity
How to Mitigate CVE-2025-22525
Immediate Actions Required
- Deactivate the Donation Block For PayPal plugin until a patched release is verified as installed
- Audit all users with contributor role or higher and remove unused accounts
- Rotate administrator passwords and invalidate active WordPress sessions
- Scan donation-enabled posts and pages for stored payloads and remove them
Patch Information
At time of publication, no fixed version is listed in the referenced advisory. Track the Patchstack advisory and the plugin's WordPress.org page for updates. Apply any release later than 2.2.0 as soon as it becomes available.
Workarounds
- Restrict post editing capabilities to trusted administrators only until a patch is applied
- Deploy a Web Application Firewall (WAF) rule to block script-tag payloads on plugin endpoints
- Enforce a strict Content Security Policy that disallows inline scripts on donation pages
- Remove or replace the plugin with an actively maintained alternative if a fix is not released promptly
# Example CSP header to mitigate stored XSS execution
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
