CVE-2020-21787

Name: CVE-2020-21787
Creator: NVD / NIST
Published: 2021-06-24T15:15:08.147+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.85%

Last modified Jun 17, 2026

CVE-2020-21787 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. CRMEB 3.1.0+ is vulnerable to File Upload Getshell via /crmeb/crmeb/services/UploadService.php.. EPSS estimates a 1.85% chance of exploitation in the next 30 days.

Description

CRMEB 3.1.0+ is vulnerable to File Upload Getshell via /crmeb/crmeb/services/UploadService.php.

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

1.85%

76.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Crmeb	Crmeb	3.1.0\+

References

https://gitee.com/ZhongBangKeJi/CRMEB/issues/I18MGDExploit, Third Party Advisory
https://gitee.com/ZhongBangKeJi/CRMEB/issues/I18MGDExploit, Third Party Advisory

Timeline

Published: Jun 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21787?

CRMEB 3.1.0+ is vulnerable to File Upload Getshell via /crmeb/crmeb/services/UploadService.php.

How severe is CVE-2020-21787?

CVE-2020-21787 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.85% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21787?

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-2020-21787?

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

Scan your code now

Source: NVD / NIST