CVE-2026-2897 in funadmin
Summary
by MITRE • 02/22/2026
A security vulnerability has been detected in funadmin up to 7.1.0-rc4. This vulnerability affects unknown code of the file app/backend/view/index/index.html of the component Backend Interface. The manipulation of the argument Value leads to cross site scripting. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 02/23/2026
This vulnerability resides within the funadmin content management system version 7.1.0-rc4 and specifically targets the backend interface component. The issue manifests in the app/backend/view/index/index.html file where an input validation flaw allows malicious actors to inject malicious scripts through the Value argument. This represents a classic cross site scripting vulnerability that operates at the application layer and demonstrates a critical weakness in the system's data sanitization processes. The vulnerability's exposure through the backend interface suggests that attackers could potentially compromise administrative sessions or gain unauthorized access to sensitive system information.
The technical exploitation of this vulnerability follows the standard XSS attack pattern where an attacker crafts malicious input containing script payloads that get executed in the context of other users' browsers. The remote execution capability means that attackers do not require physical access to the system or network privileges to exploit this flaw. The vulnerability's classification aligns with CWE-79 which defines cross site scripting as a weakness where applications fail to properly validate or escape user-supplied data before incorporating it into dynamic content. This weakness allows attackers to execute arbitrary JavaScript code in the victim's browser, potentially leading to session hijacking, data theft, or further system compromise.
The operational impact of this vulnerability extends beyond simple script execution as it compromises the integrity of the backend administrative interface. Attackers could leverage this vulnerability to escalate privileges, modify system configurations, or exfiltrate sensitive data from the administrative panel. The fact that this vulnerability has been publicly disclosed and is known to be exploitable increases the risk profile significantly. According to ATT&CK framework, this vulnerability maps to T1059.007 which covers Scripting and T1566.001 which addresses spearphishing with links, as attackers could use this flaw to deliver malicious payloads through compromised backend interfaces. The lack of vendor response to early disclosure attempts creates an additional risk factor, indicating potential vendor inaction or insufficient security response protocols.
Mitigation strategies should include immediate implementation of input validation and output encoding mechanisms to prevent malicious script injection. The system should employ Content Security Policy headers to restrict script execution and implement proper sanitization of all user inputs before rendering them in the backend interface. Additionally, regular security audits and penetration testing should be conducted to identify similar vulnerabilities across the application stack. The organization should also implement web application firewall rules to detect and block suspicious input patterns targeting known XSS attack vectors. Given the public disclosure status, deploying these mitigations immediately is critical to prevent exploitation and maintain system integrity. The vulnerability serves as a reminder of the importance of timely vendor communication and coordinated disclosure processes to ensure prompt remediation of security flaws.