CVE-2025-22506 in Smart Agenda Plugin
Summary
by MITRE • 01/13/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in SmartAgenda Smart Agenda allows Stored XSS.This issue affects Smart Agenda: from n/a through 4.7.
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Analysis
by VulDB Data Team • 02/13/2025
The vulnerability identified as CVE-2025-22506 represents a critical cross-site scripting flaw within the SmartAgenda Smart Agenda application, specifically categorized under CWE-79 Improper Neutralization of Input During Web Page Generation. This vulnerability enables attackers to inject malicious scripts into web pages viewed by other users, creating a persistent security risk that can compromise user sessions and data integrity. The flaw manifests as a stored XSS vulnerability, meaning that malicious payloads are permanently stored on the server and executed whenever affected users access the compromised content, unlike reflected XSS where the payload must be injected through external links or forms.
The technical implementation of this vulnerability occurs during the web page generation process where user input is not properly sanitized or encoded before being rendered in HTML output contexts. Attackers can exploit this weakness by submitting malicious script code through input fields or parameters that are subsequently stored in the application's database or storage mechanisms. When other users view pages containing this stored malicious content, their browsers execute the embedded scripts within their security context, potentially allowing attackers to steal session cookies, perform unauthorized actions on behalf of users, or redirect victims to malicious sites. This vulnerability affects all versions of SmartAgenda from the initial release through version 4.7, indicating a long-standing issue that has not been adequately addressed in the application's input validation mechanisms.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable sophisticated attack chains that leverage the stored nature of the XSS payload. Security practitioners must consider that this vulnerability aligns with ATT&CK technique T1531 Credential Access Through Lateral Movement, where attackers can harvest session tokens and other sensitive information from user browsers. Additionally, the stored nature of the vulnerability means that impact persists over time, potentially affecting multiple users over extended periods without proper mitigation. The vulnerability could also facilitate more advanced attacks such as session hijacking, where attackers gain unauthorized access to user accounts, or data exfiltration where sensitive information is collected from authenticated sessions.
Mitigation strategies for CVE-2025-22506 require immediate implementation of robust input sanitization and output encoding mechanisms throughout the SmartAgenda application. Organizations should implement proper HTML encoding of user-supplied content before rendering it in web pages, ensuring that potentially dangerous characters such as < > " ' & are properly escaped or removed. The application should employ Content Security Policy (CSP) headers to limit script execution and prevent unauthorized code injection. Regular security audits and input validation testing should be conducted to identify similar vulnerabilities in other application components. Patch management procedures must be established to ensure timely updates to the SmartAgenda software, as this vulnerability affects versions through 4.7 and likely requires version upgrades to address the underlying input sanitization flaws. System administrators should also implement monitoring for suspicious user input patterns and consider implementing web application firewalls to detect and block malicious payloads attempting to exploit this vulnerability.