CVE-2026-26464 is a stored Cross-Site Scripting (XSS) vulnerability identified in the Society Management System Portal version 1.0. The vulnerability exists on the /admin/edit_user.php page, where the 'name' parameter in a POST HTTP request is not properly sanitized or encoded, allowing attackers to inject arbitrary JavaScript code. This malicious code is stored persistently on the server and executed in the browsers of users who view the compromised page, including administrators. The attack vector is remote and does not require prior authentication, but user interaction is necessary to trigger the payload. The vulnerability impacts confidentiality and integrity by enabling attackers to steal session cookies, perform actions on behalf of users, or manipulate displayed content. The CVSS v3.1 score of 6.1 reflects a medium severity with network attack vector, low attack complexity, no privileges required, and user interaction needed. No patches or known exploits have been reported at the time of publication, but the vulnerability poses a significant risk in administrative contexts where elevated privileges can be abused. The scope is limited to the Society Management System Portal V1.0, and the vulnerability is classified as stored XSS, which is more dangerous than reflected XSS due to persistent code injection.

The primary impact of CVE-2026-26464 is the compromise of confidentiality and integrity within affected systems. Attackers can execute arbitrary JavaScript in the context of the victim's browser, potentially stealing session tokens, cookies, or other sensitive information. This can lead to unauthorized access, privilege escalation, or manipulation of administrative functions. Since the vulnerability affects the admin interface, successful exploitation could allow attackers to perform administrative actions or pivot further into the network. Although availability is not directly impacted, the trustworthiness of the system is undermined, and attackers could use the vulnerability as a foothold for more severe attacks. Organizations worldwide using the Society Management System Portal V1.0 are at risk, especially those with multiple administrators or users accessing the vulnerable page. The lack of known exploits in the wild suggests limited current active exploitation, but the vulnerability remains a significant threat if left unaddressed.

To mitigate CVE-2026-26464, organizations should first check for and apply any available patches or updates from the software vendor. In the absence of official patches, immediate steps include implementing strict input validation and output encoding on the 'name' parameter in /admin/edit_user.php to prevent injection of malicious scripts. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Limit administrative access to trusted networks and enforce multi-factor authentication to reduce the risk of exploitation. Regularly audit and sanitize stored user inputs to remove any injected scripts. Additionally, monitor logs for suspicious POST requests targeting the 'name' parameter and educate administrators about the risks of XSS attacks. Deploy web application firewalls (WAFs) with rules to detect and block XSS payloads targeting this endpoint. Finally, consider isolating the admin interface behind VPN or IP whitelisting to reduce exposure.