High severity · published Mar 31, 2026
CVE-2026-30877
baserCMS: OS Command Injection in the baserCMS Update Functionality
7.2
CVSS
1.5%
EPSS
No
On KEV
Description
baserCMS is a website development framework. Prior to version 5.2.3, there is an OS command injection vulnerability in the update functionality. Due to this issue, an authenticated user with administrator privileges in baserCMS can execute arbitrary OS commands on the server with the privileges of the user account running baserCMS. This issue has been patched in version 5.2.3.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BA
basercms · baserproject
< 5.2.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-30877
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-30877
Vendor Advisory
https://basercms.net/security/JVN_20837860
Release Notes
https://github.com/baserproject/basercms/releases/tag/5.2.3
Vendor Advisory
https://github.com/baserproject/basercms/security/advisories/GHSA-m9g7-rgfc-jcm7
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