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6.4
Web Terminal images allow non-root users to gain full control
CVE-2025-57853
Summary
Non-root users in certain Web Terminal images can exploit a flaw to gain complete control over the container. This is because the /etc/passwd file was created with permissions that allow non-root users to make changes. Affected users should update their images to fix this issue and prevent unauthorized access.
Original title
A container privilege escalation flaw was found in certain Web Terminal images. This issue stems from the /etc/passwd file being created with group-writable permissions during build time. In certai...
Original description
A container privilege escalation flaw was found in certain Web Terminal images. This issue stems from the /etc/passwd file being created with group-writable permissions during build time. In certain conditions, an attacker who can execute commands within an affected container, even as a non-root user, can leverage their membership in the root group to modify the /etc/passwd file. This could allow the attacker to add a new user with any arbitrary UID, including UID 0, leading to full root privileges within the container.
nvd CVSS3.1
6.4
Vulnerability type
CWE-276
Incorrect Default Permissions
Published: 8 Apr 2026 · Updated: 9 Apr 2026 · First seen: 8 Apr 2026