What is CVE-2021-41243?

CVE-2021-41243 is a critical-severity vulnerability in Basercms, classified under OS Command Injection. CVSS score: 9.1/10. Published 2021-11-26.

How severe is CVE-2021-41243?

Critical severity. CVSS v3 base score is 9.1 out of 10.

RCE in Basercms

CVE-2021-41243

There is a Potential Zip Slip Vulnerability and OS Command Injection Vulnerability on the management system of baserCMS. Users with permissions to upload files may upload crafted zip files which may execute arbitrary commands on the host operating system. This is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users. If you are eligible, please update to the new version as soon as possible.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.022 (80.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L.

Affected products

Basercms
Baserproject Basercms — versions < 4.5.4

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-41243?: CVE-2021-41243 is a critical-severity vulnerability in Basercms, classified under OS Command Injection. CVSS score: 9.1/10. Published 2021-11-26.
How severe is CVE-2021-41243?: Critical severity. CVSS v3 base score is 9.1 out of 10.