CVE-2025-0546 is a medium-severity vulnerability classified under CWE-79 (Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting or XSS) and CWE-1021 (Improper Restriction of Rendered UI Layers or Frames). This vulnerability affects Mevzuattr Software's product MevzuatTR versions prior to 12.02.2025. The flaw allows an attacker with high privileges to inject malicious scripts into web pages generated by the application. Because the vulnerability involves improper input neutralization, it enables exploitation vectors such as phishing, iFrame overlay attacks, clickjacking, and forceful browsing. The CVSS 3.1 base score is 4.7 (medium), with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), requiring high privileges (PR:H), no user interaction (UI:N), unchanged scope (S:U), and low impact on confidentiality, integrity, and availability (C:L/I:L/A:L). The vulnerability requires the attacker to have high privileges within the system, which limits the ease of exploitation but still poses a significant risk if an insider or compromised privileged account is involved. The lack of known exploits in the wild suggests it is not yet actively exploited, but the potential for phishing and UI manipulation attacks could lead to credential theft or unauthorized actions if exploited. The vulnerability also involves improper restriction of UI layers or frames, which can facilitate clickjacking attacks by overlaying malicious content on legitimate UI elements, tricking users into unintended actions. MevzuatTR is a software product likely used for regulatory or legislative content management, which may be deployed in government or legal institutions. The absence of patch links indicates that a fix may not yet be publicly available, so affected organizations should prioritize mitigation and monitoring.

For European organizations, especially those in government, legal, or regulatory sectors using MevzuatTR, this vulnerability could lead to significant risks. Exploitation could enable attackers with high privileges to conduct phishing campaigns or manipulate user interfaces to deceive users into divulging sensitive information or performing unauthorized actions. The clickjacking and iFrame overlay aspects could compromise the integrity of user interactions with critical regulatory data or services. While the vulnerability requires high privileges, insider threats or compromised privileged accounts could leverage this flaw to escalate attacks or bypass security controls. This could result in data leakage, unauthorized access to sensitive legislative or regulatory information, and erosion of trust in digital government services. The medium CVSS score reflects moderate impact, but the strategic importance of affected systems in Europe elevates the potential consequences. Additionally, forceful browsing could allow attackers to access restricted UI layers or functions, further increasing risk. The lack of known exploits currently provides a window for proactive defense, but organizations should not underestimate the threat given the sensitive nature of the affected software.

1. Restrict and monitor privileged account usage rigorously to prevent misuse or compromise, including implementing strong multi-factor authentication and session management controls. 2. Apply the vendor's patch or update to version 12.02.2025 or later as soon as it becomes available to remediate the vulnerability. 3. Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 4. Use frame-busting techniques or X-Frame-Options headers to prevent clickjacking by disallowing the application from being embedded in iframes on untrusted domains. 5. Conduct regular security audits and code reviews focusing on input validation and output encoding to detect and fix similar issues proactively. 6. Educate privileged users about phishing and social engineering risks, as their accounts are critical attack vectors. 7. Employ web application firewalls (WAFs) with rules tuned to detect and block suspicious script injection attempts targeting MevzuatTR. 8. Monitor logs and user behavior for unusual activity indicative of exploitation attempts, especially from privileged accounts. 9. Limit the attack surface by disabling unnecessary UI layers or features that could be abused for forceful browsing.