CVE-2021-47949Public exploitNetwork attack vectorHinoki check available

Authenticated code execution via symlink following

Published May 10, 2026 · Updated May 10, 2026

Command execution in CyberPanel 2.1 and earlier allows remote authenticated users to read arbitrary files and execute shell commands. The filemanager controller follows symbolic links created from the user-controlled completeStartingPath value, while /websites/fetchFolderDetails executes attacker-supplied shell commands. A valid low-privilege account is required; successful exploitation exposes server files and runs commands with the panel service's operating-system privileges.

CVSS severity8.7
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Command execution in CyberPanel 2.1 and earlier allows remote authenticated users to read arbitrary files and execute shell commands. The filemanager controller follows symbolic links created from the user-controlled completeStartingPath value, while /websites/fetchFolderDetails executes attacker-supplied shell commands. A valid low-privilege account is required; successful exploitation exposes server files and runs commands with the panel service's operating-system privileges.

The record

CVE
CVE-2021-47949
Published
May 10, 2026
Updated
May 10, 2026
Vendor
CyberPanel
Product
CyberPanel
Classifications
CWE-59, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 10, 2026CVE publishedPublication date reported by the CVE source.
  2. May 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CyberPanel · CyberPanelversion=<= 2.1

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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