CVE-2026-30877
Critical
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.
SeverityCritical
CVSS9.1
Exploit probability—
ProductBasercms
PublishedMar 31, 2026
First seenMar 31, 2026
Weakness typeCWE-78OS command injection
How to fix
Update
- basercms basercms5.2.3 or later
- baserproject/basercms5.2.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| basercms basercms | v < 5.2.3 | 5.2.3 |
| baserproject/basercmsPackagist | v < 5.2.3 | 5.2.3 |
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