How severe is CVE-2021-20259?

CVE-2021-20259 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-20259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20259?

CVE-2021-20259 affects Theforeman Foremanfogproxmox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20259?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-20259 published?

CVE-2021-20259 was published on 2021-06-07 and last updated on 2026-06-17.

CVE-2021-20259

CVE-2021-20259 is a high-severity vulnerability in Theforeman Foremanfogproxmox with a CVSS 3.x base score of 7.8. 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-200.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Theforeman Foremanfogproxmox
Published: 2021-06-07
Last modified: 2026-06-17

Description

A flaw was found in the Foreman project. The Proxmox compute resource exposes the password through the API to an authenticated local attacker with view_hosts permission. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Versions before foreman_fog_proxmox 0.13.1 are affected

Frequently asked questions

What is CVE-2021-20259?: A flaw was found in the Foreman project. The Proxmox compute resource exposes the password through the API to an authenticated local attacker with view_hosts permission. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Versions before foreman_fog_proxmox 0.13.1 are affected
How severe is CVE-2021-20259?: CVE-2021-20259 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-20259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20259?: CVE-2021-20259 affects Theforeman Foremanfogproxmox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20259?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-20259 published?: CVE-2021-20259 was published on 2021-06-07 and last updated on 2026-06-17.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1932144

Affected products (1)

cpe:2.3:a:theforeman:foremanfogproxmox:*:*:*:*:*:*:*:*

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