CVE-2020-18890

Name: CVE-2020-18890
Creator: NVD / NIST
Published: 2021-05-06T18:15:07.997+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.52%

Last modified Jun 17, 2026

CVE-2020-18890 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Rmote Code Execution (RCE) vulnerability in puppyCMS v5.1 due to insecure permissions, which could let a remote malicious user getshell via /admin/functions.php.. EPSS estimates a 1.52% chance of exploitation in the next 30 days.

Description

Rmote Code Execution (RCE) vulnerability in puppyCMS v5.1 due to insecure permissions, which could let a remote malicious user getshell via /admin/functions.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

1.52%

71.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-281

Affected Software

Vendor	Product	Versions
Puppycms	Puppycms	5.1

References

https://github.com/choregus/puppyCMS/issues/14Exploit, Issue Tracking, Third Party Advisory
https://github.com/choregus/puppyCMS/issues/14Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: May 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-18890?

Rmote Code Execution (RCE) vulnerability in puppyCMS v5.1 due to insecure permissions, which could let a remote malicious user getshell via /admin/functions.php.

How severe is CVE-2020-18890?

CVE-2020-18890 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.52% probability of exploitation in the next 30 days.

How do I fix CVE-2020-18890?

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-2020-18890?

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

Scan your code now

Source: NVD / NIST