CVE-2025-14244 identifies a cross-site scripting vulnerability in GreenCMS version 2.3.0603, specifically within the /Admin/Controller/CustomController.class.php file that handles the Menu Management Page. The vulnerability is caused by insufficient input validation or sanitization of the 'Link' parameter, which can be manipulated by an attacker to inject malicious JavaScript code. This flaw allows remote attackers to execute arbitrary scripts in the context of an authenticated administrator or user with high privileges. The vulnerability does not require authentication bypass but does require the attacker to have high privileges (PR:H) and some user interaction (UI:P), such as tricking an administrator into clicking a crafted link. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no confidentiality impact (C:N), low integrity impact (I:L), and no availability impact (A:N). The vulnerability affects only an unsupported version of GreenCMS, and no official patches or updates have been released. While no known exploits are currently active in the wild, proof-of-concept code has been published, increasing the risk of future exploitation. The vulnerability primarily threatens the confidentiality and integrity of administrative sessions and data within the affected CMS installation.

The primary impact of this vulnerability is the potential for attackers to execute malicious scripts in the context of authenticated users with high privileges, such as administrators. This can lead to session hijacking, credential theft, unauthorized actions within the CMS, or defacement of the website. Since the vulnerability affects an unsupported version of GreenCMS, organizations using it face increased risk due to the absence of official patches or vendor support. The attack requires user interaction and high privileges, limiting the scope somewhat; however, successful exploitation can compromise the integrity and confidentiality of the CMS environment. This can disrupt website management, damage organizational reputation, and potentially expose sensitive data managed through the CMS. The lack of availability impact means the system remains operational, but the trustworthiness of the content and administrative control is undermined.

Given the lack of official patches due to the product's unsupported status, organizations should prioritize upgrading to a supported and patched version of GreenCMS or migrating to an alternative CMS platform. If upgrading is not immediately feasible, implement strict input validation and output encoding on the 'Link' parameter within the Menu Management Page to neutralize malicious scripts. Employ web application firewalls (WAFs) with custom rules to detect and block XSS payloads targeting this specific parameter. Restrict administrative access to trusted networks and enforce multi-factor authentication to reduce the risk of compromised credentials. Conduct regular security awareness training for administrators to recognize and avoid phishing or social engineering attempts that could trigger user interaction-based exploits. Monitor logs for suspicious activities related to the Menu Management Page and the 'Link' parameter. Finally, isolate legacy CMS installations from critical infrastructure and sensitive data to limit potential damage.