CVE-2021-20259

Exposure of Sensitive Information to an Unauthorized Actor in foreman_fog_proxmox

7.8 HighFix available

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

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.27%Down 0.7 points since Jun 8, 2021

What each source reports

NVD Score used 7.8

Record: CVE-2021-20259
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 4.6 MediumAV:L/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-200
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-20259
Weakness: CWE-200
Updated: 2026-11-02

EUVDEUVD-2021-1313 No score

Record: EUVD-2021-1313
Updated: 2026-11-03

GitHub AdvisoriesGHSA-f2rp-4rv7-fc95 7.8

Exposure of Sensitive Information to an Unauthorized Actor in foreman_fog_proxmox

Record: GHSA-f2rp-4rv7-fc95
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-200
Updated: 2026-11-02

OSV 7.8

Record: CVE-2021-20259
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-f2rp-4rv7-fc95 7.8

Exposure of Sensitive Information to an Unauthorized Actor in foreman_fog_proxmox

Record: GHSA-f2rp-4rv7-fc95
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-200
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`foreman_fog_proxmox` RubyGems	before 0.13.1	0.13.1
`foreman_fog_proxmox` RubyGems	before 0.13.1, plus listed versions 0.10.00.10.10.10.20.11.00.11.1 Show 22 moreShow less 0.12.00.12.10.12.20.12.40.13.00.4.00.5.00.5.10.5.20.5.30.5.40.5.50.5.60.6.00.7.00.8.00.8.20.9.00.9.10.9.20.9.30.9.4	0.13.1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-20259 is a high vulnerability (CVSS 7.8) in The Foreman Foreman, published June 7, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 19th percentile. Fixed in foreman_fog_proxmox 0.13.1.