CVE-2021-27231

Name: CVE-2021-27231
Creator: NVD / NIST
Published: 2021-02-16T04:15:12.827+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.41%

Last modified Jun 17, 2026

CVE-2021-27231 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Hestia Control Panel 1.3.5 and below, in a shared-hosting environment, sometimes allows remote authenticated users to create a subdomain for a different customer's domain name, leading to spoofing of services or email messages.. EPSS estimates a 1.41% chance of exploitation in the next 30 days.

Description

Hestia Control Panel 1.3.5 and below, in a shared-hosting environment, sometimes allows remote authenticated users to create a subdomain for a different customer's domain name, leading to spoofing of services or email messages.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

1.41%

69.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Hestiacp	Control Panel	<= 1.3.5

References

https://github.com/hestiacp/hestiacp/issues/1622Third Party Advisory
https://github.com/sickcodes/security/blob/master/advisories/sick-2021-006.mdBroken Link
https://sick.codes/sick-2021-006Exploit, Third Party Advisory
https://www.hestiacp.com/Vendor Advisory
https://github.com/hestiacp/hestiacp/issues/1622Third Party Advisory
https://github.com/sickcodes/security/blob/master/advisories/sick-2021-006.mdBroken Link
https://sick.codes/sick-2021-006Exploit, Third Party Advisory
https://www.hestiacp.com/Vendor Advisory

Timeline

Published: Feb 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27231?

How severe is CVE-2021-27231?

CVE-2021-27231 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.41% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27231?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27231?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST