How severe is CVE-2021-3457?

CVE-2021-3457 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2021-3457 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3457?

CVE-2021-3457 affects Theforeman Smart Proxy Shell Hooks. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3457?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-3457 published?

CVE-2021-3457 was published on 2021-05-12 and last updated on 2026-06-17.

CVE-2021-3457

CVE-2021-3457 is a medium-severity vulnerability in Theforeman Smart Proxy Shell Hooks with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 3.6
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Theforeman Smart Proxy Shell Hooks
Published: 2021-05-12
Last modified: 2026-06-17

Description

An improper authorization handling flaw was found in Foreman. The Shellhooks plugin for the smart-proxy allows Foreman clients to execute actions that should be limited to the Foreman Server. This flaw allows an authenticated local attacker to access and delete limited resources and also causes a denial of service on the Foreman server. The highest threat from this vulnerability is to integrity and system availability.

Frequently asked questions

What is CVE-2021-3457?: An improper authorization handling flaw was found in Foreman. The Shellhooks plugin for the smart-proxy allows Foreman clients to execute actions that should be limited to the Foreman Server. This flaw allows an authenticated local attacker to access and delete limited resources and also causes a denial of service on the Foreman server. The highest threat from this vulnerability is to integrity and system availability.
How severe is CVE-2021-3457?: CVE-2021-3457 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2021-3457 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3457?: CVE-2021-3457 affects Theforeman Smart Proxy Shell Hooks. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3457?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3457 published?: CVE-2021-3457 was published on 2021-05-12 and last updated on 2026-06-17.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1940990

Affected products (1)

cpe:2.3:a:theforeman:smart_proxy_shell_hooks:*:*:*:*:*:*:*:*

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