Vulnerability Description
baserCMS is a website development framework. Prior to version 5.2.3, baserCMS contains an OS command injection vulnerability in the core update functionality. An authenticated administrator can execute arbitrary OS commands on the server due to improper handling of user-controlled input that is directly passed to exec() without sufficient validation or escaping. This issue has been patched in version 5.2.3.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Basercms | Basercms | < 5.2.3 |
Related Weaknesses (CWE)
References
- https://basercms.net/security/JVN_20837860Vendor Advisory
- https://github.com/baserproject/basercms/releases/tag/5.2.3Release Notes
- https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86gExploitVendor Advisory
- https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86gExploitVendor Advisory
FAQ
What is CVE-2026-21861?
CVE-2026-21861 is a vulnerability with a CVSS score of 9.1 (CRITICAL). baserCMS is a website development framework. Prior to version 5.2.3, baserCMS contains an OS command injection vulnerability in the core update functionality. An authenticated administrator can execut...
How severe is CVE-2026-21861?
CVE-2026-21861 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-21861?
Check the references section above for vendor advisories and patch information. Affected products include: Basercms Basercms.