CVE-2025-69029 is an authorization bypass vulnerability affecting Select-Themes Struktur versions up to and including 2.5.1. The root cause is an incorrectly configured access control mechanism that relies on a user-controlled key, which attackers can manipulate to bypass authorization checks. This allows an attacker with low-level privileges (PR:L) to gain unauthorized access to restricted resources or functionalities without requiring user interaction (UI:N). The vulnerability is remotely exploitable over the network (AV:N) and impacts confidentiality and integrity (C:L/I:L) but does not affect availability (A:N). The CVSS score of 5.4 reflects a medium severity level, indicating a moderate risk. No public exploits or patches are currently available, but the vulnerability is published and should be addressed promptly. The issue highlights the importance of properly validating and restricting user-controlled inputs in access control implementations to prevent privilege escalation and unauthorized data access.

For European organizations, the vulnerability poses a risk of unauthorized data access and potential privilege escalation within applications using Struktur. Confidential information could be exposed or modified by attackers exploiting this flaw, undermining data integrity and potentially violating data protection regulations such as GDPR. Although availability is not impacted, the breach of confidentiality and integrity could lead to reputational damage, regulatory fines, and operational disruptions. Organizations relying on Struktur for website themes or content management should consider the sensitivity of the data handled and the criticality of the affected systems. Attackers exploiting this vulnerability could gain footholds to further pivot within networks, increasing overall risk.

Organizations should immediately audit their use of Select-Themes Struktur to identify affected versions (<= 2.5.1). Until an official patch is released, implement strict access control policies and input validation to prevent manipulation of user-controlled keys. Restrict access to administrative or sensitive functionalities to trusted users only and monitor logs for unusual access patterns indicative of exploitation attempts. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting access control mechanisms. Regularly update and patch Struktur once vendors release fixes. Additionally, conduct security reviews of all access control implementations to ensure no other user-controlled parameters can bypass authorization. Educate developers on secure coding practices related to access control and input validation.