GHSA-6hpg-8rx3-cwgv — critical GitHub Advisory (CVE-2026-30880) in composer/baserproject/basercms

Description

baserCMS has an OS command injection vulnerability in the installer.

baserCMS 5.2.2 and earlier versions

If baserCMS is placed on a server but not installed, malicious commands may be executed.

Update to the latest version of baserCMS

Please refer to the following page to reference for more information.
https://basercms.net/security/JVN_54513170

REN XINGDIAN

Score	Percentile
0.24%	47.28%

Base score	Version	Severity	Vector
9.2	4.0	—	`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network. Attack complexity (AC:H) Exploitation depends on constrained or hard-to-reproduce conditions. Attack requirements (AT:N) No additional preconditions are required beyond normal reachability. Privileges required (PR:N) No privileges are required. User interaction (UI:N) No user interaction is required. Vulnerable system confidentiality impact (VC:H) High confidentiality impact on the vulnerable system. Vulnerable system integrity impact (VI:H) High integrity impact on the vulnerable system. Vulnerable system availability impact (VA:H) High availability impact on the vulnerable system. Subsequent system confidentiality impact (SC:N) No confidentiality impact on subsequent systems. Subsequent system integrity impact (SI:N) No integrity impact on subsequent systems. Subsequent system availability impact (SA:N) No availability impact on subsequent systems.

Type	Value
GHSA	GHSA-6hpg-8rx3-cwgv ↗
CVE	CVE-2026-30880 ↗

CWE id	Name
CWE-78	Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
composer	baserproject/basercms	<= 5.2.2	5.2.3	—