CVE-2025-57853: A container privilege escalation flaw was found in certain Web Terminal images

Routine

MEDIUM 6.4WATCHLISTMITIGATE

CVE-2025-57853 is a medium-severity flaw (CVSS 6.4) affecting web terminal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.4 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-276
Published	2026-04-08
Last modified	2026-07-24

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 14:16 UTCPublished CVE record published
2026-07-24 20:10 UTCUpdated Record last modified

redhat web terminal MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy web-terminal || rpm -q web-terminal || web-terminal --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-57853?

web terminal: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-57853 being exploited?

CVE-2025-57853 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-57853 affect?

CVE-2025-57853 affects web terminal. Severity is medium (CVSS 6.4). 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 c

How urgent is CVE-2025-57853?

Priority 29/100. On your watchlist

References

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