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CVE-2025-57853— Web-terminal: privilege escalation via excessive /etc/passwd permissions

Quick assessment

Affected
Red Hat Red Hat Web Terminal
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Red Hat Web Terminal是美国红帽（Red Hat）公司的一个基于浏览器的终端工具。 Red Hat Web Terminal存在安全漏洞，该漏洞源于构建过程中/etc/passwd文件被设置为组可写权限，可能导致攻击者在容器内获得完整root权限。

CVSS 6.4 · Medium EPSS 0.16% · P4

Possible ATT&CK Techniques 1 AI

T1611.001
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I. Basic Information for CVE-2025-57853

Vulnerability Information
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Vulnerability Title
Web-terminal: privilege escalation via excessive /etc/passwd permissions
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缺省权限不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Web Terminal 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Web Terminal是美国红帽（Red Hat）公司的一个基于浏览器的终端工具。 Red Hat Web Terminal存在安全漏洞，该漏洞源于构建过程中/etc/passwd文件被设置为组可写权限，可能导致攻击者在容器内获得完整root权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

II. Public POCs for CVE-2025-57853

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III. Intelligence Information for CVE-2025-57853

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Vendor Advisories for CVE-2025-57853 (1)

Same Patch Batch · Red Hat · 2026-04-08 · 10 CVEs total

CVE-2026-32589 7.4 HIGH Mirror-registry: quay: insecure direct object reference in blobupload
CVE-2026-32590 7.1 HIGH Mirror-registry: remote code execution using pickle deserialization
CVE-2026-2377 6.5 MEDIUM Mirror-registry: quay: quay: server-side request forgery via log export functionality
CVE-2025-57851 6.4 MEDIUM Mce: privilege escalation via excessive /etc/passwd permissions
CVE-2025-57847 6.4 MEDIUM Ansible-automation-platform: privilege escalation via excessive group writable /etc/passwd
CVE-2025-57854 6.4 MEDIUM Osus-operator: privilege escalation via excessive /etc/passwd permissions
CVE-2025-58713 6.4 MEDIUM Rhpam: privilege escalation via excessive /etc/passwd permissions
CVE-2025-14243 5.3 MEDIUM Mirror-registry: openshift mirror registry: user enumeration via authentication error mess
CVE-2026-32591 5.2 MEDIUM Mirror-registry: quay: server-side request forgery in proxy cache upstream registry config

IV. Related Vulnerabilities

Same vendor: Red Hat
Same weakness: CWE-276

V. Comments for CVE-2025-57853

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