CVE-2026-34427 describes a privilege escalation vulnerability in the Vvveb product by givanz, affecting versions prior to 1.0.8.1. The flaw exists in the admin user profile save endpoint, where authenticated users can improperly modify dynamically-determined object attributes, specifically privileged fields like role_id. By injecting role_id=1 in profile save requests, an attacker can escalate their privileges to Super Administrator, gaining access to plugin upload features that may allow remote code execution. The vulnerability is classified under CWE-915 (Improperly Controlled Modification of Dynamically-Determined Object Attributes). The CVSS 4.0 vector indicates network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, and availability.

Successful exploitation allows an authenticated user to escalate privileges to Super Administrator, granting them the ability to upload plugins. This can lead to remote code execution, compromising the system's confidentiality, integrity, and availability. The vulnerability poses a high risk to affected installations of Vvveb prior to version 1.0.8.1.

No official patch or remediation is currently available from the vendor. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict access to authenticated user accounts and monitor for suspicious activity related to profile modifications. Avoid granting unnecessary privileges to users and consider additional access controls to limit the impact of potential exploitation.