HOMEVULNERABILITIESCVE-2021-3457
MEDIUM

CVE-2021-3457

CWE-863Published: May 12, 2021· Updated: Jun 17, 2026

6.1
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-3457 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Affected Vendors & Products

theforeman1 product(s)
smart proxy shell hooks
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

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

All References (2)

→
https://bugzilla.redhat.com/show_bug.cgi?id=1940990Issue Tracking · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1940990Issue Tracking · Third Party Advisory

Quick Facts

CVE IDCVE-2021-3457
CVSS Score6.1 / 10
SeverityMEDIUM
WeaknessCWE-863
CISA KEVNo
Affected1 vendor(s)
PublishedMay 12, 2021

Related CVEs (CWE-863)

CVE-2023-4617
10.0
CVE-2026-48321
10.0
CVE-2026-44330
10.0
CVE-2021-38503
10.0
CVE-2020-13300
10.0
CVE-2026-48303
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-3457 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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