CVE-2025-23925 in Feedburner Optin Form Plugin
Summary
by MITRE • 01/16/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Jimmy Peña Feedburner Optin Form allows Stored XSS.This issue affects Feedburner Optin Form: from n/a through 0.2.8.
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Analysis
by VulDB Data Team • 02/10/2025
The vulnerability identified as CVE-2025-23925 represents a critical cross-site scripting flaw within the Jimmy Peña Feedburner Optin Form plugin, classified under CWE-79 Improper Neutralization of Input During Web Page Generation. This weakness enables attackers to inject malicious scripts into web pages viewed by other users, creating a persistent security risk that can affect multiple visitors over time. The vulnerability specifically manifests as a stored XSS attack, meaning that malicious code injected by an attacker is permanently stored on the server and executed whenever affected pages are accessed by legitimate users.
The technical flaw occurs during the web page generation process where user input provided through the Feedburner Optin Form is not properly sanitized or escaped before being rendered back to users. This failure to neutralize input allows attackers to embed malicious JavaScript code within form fields or configuration parameters that are then stored in the application's database. When other users view pages containing this compromised data, their browsers execute the injected scripts, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The affected version range spans from an unknown starting point through version 0.2.8, indicating that any installation within this range could be vulnerable to exploitation.
The operational impact of this stored XSS vulnerability is particularly severe as it allows attackers to maintain persistent access to victims' browsers without requiring repeated exploitation attempts. Once the malicious payload is injected, it will execute automatically every time affected pages are loaded, providing attackers with continuous access to user sessions, cookies, and potentially sensitive data. This vulnerability can be exploited by attackers who gain access to the form configuration or by compromising users who submit malicious input through the form interface. The persistent nature of stored XSS makes it especially dangerous for content management systems and web applications where user-generated content is displayed without proper sanitization.
Mitigation strategies for CVE-2025-23925 should prioritize immediate patching of the Feedburner Optin Form plugin to the latest secure version that addresses the XSS vulnerability. Organizations should implement comprehensive input validation and output encoding mechanisms to prevent malicious scripts from being stored or executed within the application. Security measures including content security policies, proper sanitization of user inputs, and regular security audits of web applications can significantly reduce the risk of exploitation. Additionally, implementing web application firewalls and monitoring for suspicious input patterns can provide additional layers of protection. According to ATT&CK framework category T1190 Exploit Public-Facing Application, this vulnerability represents a common attack vector that leverages weak input validation to compromise web applications. Organizations should also consider implementing automated vulnerability scanning tools to identify similar issues in other plugins or custom web applications. The remediation process should include thorough testing of patched versions to ensure that the XSS vulnerability is completely resolved without introducing regressions in functionality.