CVE-2026-1978 in NanoCMS
Summary
by MITRE • 02/06/2026
A vulnerability was detected in kalyan02 NanoCMS up to 0.4. Affected by this issue is some unknown functionality of the file /data/pagesdata.txt of the component User Information Handler. Performing a manipulation results in direct request. It is possible to initiate the attack remotely. The exploit is now public and may be used. You should change the configuration settings.
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Analysis
by VulDB Data Team • 02/27/2026
This vulnerability resides within the kalyan02 NanoCMS version 0.4 and specifically targets the User Information Handler component. The flaw exists in the file /data/pagesdata.txt which processes user-related data, creating a potential attack vector that allows remote exploitation through direct request manipulation. The vulnerability's classification as a remote exploit indicates that attackers can initiate malicious activities without requiring physical access to the system. This represents a critical security risk as it enables unauthorized users to manipulate the application's behavior through network-based attacks.
The technical implementation of this vulnerability involves manipulation of the pagesdata.txt file which serves as a data storage mechanism for user information within the CMS. When the User Information Handler processes requests involving this file, the system fails to properly validate or sanitize input parameters, allowing attackers to inject malicious commands or alter data structures. This type of vulnerability typically falls under CWE-79 - Cross-Site Scripting or CWE-94 - Code Injection depending on the specific implementation details. The direct request functionality suggests that the vulnerability may also be classified under CWE-20 - Improper Input Validation, as the system does not adequately filter or validate user-supplied data before processing.
The operational impact of this vulnerability is severe as it provides remote attackers with the capability to compromise user data and potentially gain unauthorized access to the CMS system. The public availability of the exploit means that malicious actors can readily leverage this weakness without requiring advanced technical skills. Attackers could potentially modify user information, inject malicious code, or escalate privileges within the system. This vulnerability directly impacts the confidentiality, integrity, and availability of the application's user data, creating potential for data breaches and unauthorized system access. The remote nature of the attack means that the vulnerability can be exploited from anywhere on the internet without requiring local network access.
Mitigation strategies should include immediate implementation of input validation controls and sanitization of all user-supplied data before processing. The configuration settings mentioned in the advisory should be updated to restrict direct file access and implement proper access controls for the pagesdata.txt file. System administrators should consider implementing web application firewalls to monitor and filter suspicious requests targeting the vulnerable component. Additionally, the CMS should be updated to a patched version if available, and the affected file should be secured with appropriate file permissions to prevent unauthorized modifications. Regular security audits and vulnerability assessments should be conducted to identify similar weaknesses in other components of the system. The remediation process should also include monitoring network traffic for exploitation attempts and implementing proper logging mechanisms to track access to the vulnerable file. Organizations should also consider implementing principle of least privilege access controls and regular security training for administrators to prevent unauthorized modifications to critical system files.