CVE-2021-27983

Name: CVE-2021-27983
Creator: NVD / NIST
Published: 2021-12-10T19:15:07.74+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.47%

Last modified Jun 17, 2026

CVE-2021-27983 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Remote Code Execution (RCE) vulnerability exists in MaxSite CMS v107.5 via the Documents page.. EPSS estimates a 3.47% chance of exploitation in the next 30 days.

Description

Remote Code Execution (RCE) vulnerability exists in MaxSite CMS v107.5 via the Documents page.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

3.47%

87.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Max-3000	Maxsite Cms	107.5

References

https://github.com/maxsite/cms/issues/430Exploit, Third Party Advisory
https://github.com/maxsite/cms/issues/430Exploit, Third Party Advisory

Timeline

Published: Dec 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27983?

Remote Code Execution (RCE) vulnerability exists in MaxSite CMS v107.5 via the Documents page.

How severe is CVE-2021-27983?

CVE-2021-27983 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.47% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27983?

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-2021-27983?

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

Scan your code now

Source: NVD / NIST