Critical severity9.1NVD Advisory· Published Mar 31, 2026· Updated Apr 1, 2026
CVE-2026-21861
CVE-2026-21861
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
baserproject/basercmsPackagist | < 5.2.3 | 5.2.3 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86gnvdExploitVendor AdvisoryWEB
- basercms.net/security/JVN_20837860nvdVendor AdvisoryWEB
- github.com/advisories/GHSA-qxmc-6f24-g86gghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-21861ghsaADVISORY
- github.com/baserproject/basercms/releases/tag/5.2.3nvdRelease NotesWEB
News mentions
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