CVE-2024-22927 is a Cross Site Scripting (XSS) vulnerability identified in the 'func' parameter of eyoucms version 1.6.5. This vulnerability allows a remote attacker to inject and execute arbitrary code within the context of a victim's browser by crafting a malicious URL that exploits improper input sanitization in the affected parameter. The vulnerability is classified under CWE-79, which pertains to improper neutralization of input during web page generation, leading to XSS attacks. The CVSS 3.1 base score is 6.1, indicating a medium severity level. The vector details specify that the attack can be performed remotely (AV:N), requires low attack complexity (AC:L), no privileges (PR:N), but does require user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. The impact affects confidentiality and integrity at a low level, with no impact on availability. No patches or known exploits in the wild have been reported as of the publication date (February 1, 2024). The vulnerability enables attackers to potentially steal session cookies, perform actions on behalf of users, or manipulate web content, depending on the victim's privileges and the application's context. Given the lack of vendor or product details beyond eyoucms 1.6.5, the vulnerability is specific to this CMS platform and its deployment environments.

For European organizations using eyoucms version 1.6.5, this vulnerability poses a risk of client-side code injection leading to session hijacking, unauthorized actions, or data theft through browser-based attacks. The impact is particularly significant for organizations relying on eyoucms for public-facing websites or internal portals where user trust and data confidentiality are critical. Exploitation could lead to reputational damage, regulatory non-compliance (e.g., GDPR violations if personal data is compromised), and potential financial losses due to fraud or data breaches. Since the attack requires user interaction, phishing or social engineering campaigns could be used to lure users into clicking malicious links. The changed scope indicates that the vulnerability could affect resources beyond the immediate vulnerable component, potentially escalating the impact within the web application environment. However, the absence of known exploits in the wild and the medium severity rating suggest that the threat is moderate but should not be underestimated, especially in sectors with high security requirements such as finance, healthcare, and government services.

1. Immediate mitigation should include applying any available patches or updates from the eyoucms developers once released. Since no patch links are currently available, organizations should monitor vendor communications closely. 2. Implement robust input validation and output encoding on the 'func' parameter and all user-supplied inputs to prevent injection of malicious scripts. 3. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 4. Educate users about the risks of clicking on suspicious links, especially those received via email or messaging platforms, to reduce the likelihood of successful social engineering. 5. Use web application firewalls (WAFs) with rules tailored to detect and block XSS attack patterns targeting the vulnerable parameter. 6. Conduct security audits and penetration testing focused on XSS vulnerabilities in the eyoucms environment. 7. Review and restrict user privileges to minimize the impact of potential session hijacking or unauthorized actions. 8. Monitor web server and application logs for unusual activity or repeated attempts to exploit the 'func' parameter. These measures, combined, will reduce the risk and potential impact of exploitation.