CVE-2025-52277 is a Cross Site Scripting (XSS) vulnerability identified in YesWiki version 4.54. This vulnerability arises from improper sanitization of user input in the 'meta configuration robots' field, which allows a remote attacker to inject and execute arbitrary code within the context of the victim's browser. The attack vector is network-based (AV:N), requiring no privileges (PR:N) but does require user interaction (UI:R), such as clicking a crafted link or visiting a malicious page. The vulnerability has a scope change (S:C), meaning the impact extends beyond the vulnerable component to affect other components or systems. The confidentiality and integrity impacts are low (C:L, I:L), while availability is not affected (A:N). The CVSS score is 6.1, categorizing it as a medium severity issue. The vulnerability is classified under CWE-79, which is a common weakness related to improper neutralization of input leading to XSS. No known exploits are currently reported in the wild, and there are no patches publicly available at this time. The vulnerability could be exploited by attackers to execute scripts that steal session cookies, perform actions on behalf of authenticated users, or redirect users to malicious sites, potentially leading to further compromise or data leakage.

For European organizations using YesWiki 4.54, this vulnerability poses a moderate risk primarily to web application security and user data confidentiality. Exploitation could allow attackers to hijack user sessions, manipulate user interactions, or conduct phishing attacks by injecting malicious scripts. This can lead to unauthorized access to sensitive information or disruption of user trust. While the direct impact on system availability is negligible, the reputational damage and potential regulatory consequences under GDPR for data breaches involving personal data could be significant. Organizations relying on YesWiki for collaborative content management or public-facing websites should be particularly cautious, as attackers could leverage this vulnerability to target employees or customers. The requirement for user interaction limits the attack surface somewhat but does not eliminate risk, especially in environments with high user traffic or less security-aware users.

European organizations should implement the following specific mitigations: 1) Immediately audit and sanitize all inputs to the 'meta configuration robots' field, employing strict input validation and output encoding to neutralize malicious scripts. 2) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 3) Educate users to recognize and avoid suspicious links or content that could trigger XSS payloads. 4) Monitor web application logs for unusual activity or injection attempts targeting the robots meta tag. 5) If possible, upgrade YesWiki to a patched version once available or apply vendor-recommended workarounds. 6) Use web application firewalls (WAFs) configured to detect and block XSS payloads targeting this specific vector. 7) Conduct regular security assessments and penetration testing focusing on input validation weaknesses in YesWiki deployments.