CVE-2026-25353 in Nooni Plugin
Summary
by MITRE • 03/25/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in skygroup Nooni nooni allows Reflected XSS.This issue affects Nooni: from n/a through < 1.5.1.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 03/31/2026
This vulnerability represents a classic cross-site scripting flaw that enables attackers to inject malicious scripts into web pages viewed by other users. The issue manifests in the skygroup Nooni nooni application where input validation is insufficient during web page generation processes. The reflected nature of this vulnerability means that malicious scripts are executed from data provided by the user through HTTP requests, typically via URL parameters or form inputs. Attackers can craft malicious URLs that, when clicked by victims, will execute arbitrary JavaScript code in the victim's browser context. This type of vulnerability falls under CWE-79 which specifically addresses improper neutralization of input during web page generation, making it a direct descendant of the well-known web application security weakness. The vulnerability affects all versions of the Nooni application prior to version 1.5.1, indicating that the developers identified and patched this issue in their update cycle.
The technical implementation of this flaw occurs when the application fails to properly sanitize or encode user-supplied data before incorporating it into dynamically generated web content. When users submit input through various application interfaces, the application processes this data without adequate validation or encoding measures. This creates an environment where malicious scripts can be injected and subsequently executed by other users who view the affected web pages. The reflected characteristic means that the malicious script is not stored on the server but is instead reflected back to the user through the application's response. This approach requires social engineering to deliver the malicious payload, typically through phishing emails or compromised links that users are tricked into clicking.
The operational impact of this vulnerability is significant as it allows attackers to perform various malicious activities through the victim's browser session. Attackers can steal session cookies, perform actions on behalf of users, redirect them to malicious sites, or even install malware. The reflected nature makes this particularly dangerous in targeted attacks where attackers can craft specific payloads for individual victims. This vulnerability enables a wide range of attack vectors including credential theft, session hijacking, and data exfiltration. The impact extends beyond simple script execution as it can lead to complete compromise of user accounts and potentially the underlying system if users have elevated privileges. Organizations using affected versions of Nooni face increased risk of data breaches and unauthorized access to their systems through this vector.
Mitigation strategies should focus on implementing robust input validation and output encoding mechanisms throughout the application. The most effective immediate fix is to upgrade to version 1.5.1 or later where the vulnerability has been patched. Developers should implement proper HTML encoding for all user-supplied data before rendering it in web pages, following the principle of least privilege in input handling. The application should validate and sanitize all input parameters, particularly those used in URL query strings and form submissions. Implementing Content Security Policy headers can provide additional protection against script execution. Regular security testing including automated vulnerability scanning and manual penetration testing should be conducted to identify similar issues. Organizations should also implement proper security awareness training for users to recognize and avoid phishing attempts that may exploit this vulnerability. This issue aligns with ATT&CK technique T1566 which covers spearphishing attacks and the broader T1059 which covers execution through scripting. The vulnerability demonstrates the importance of following secure coding practices and the OWASP Top Ten security principles, particularly those related to input validation and output encoding.