High severity7.2NVD Advisory· Published Mar 31, 2026· Updated Apr 1, 2026
CVE-2026-30940
CVE-2026-30940
Description
baserCMS is a website development framework. Prior to version 5.2.3, a path traversal vulnerability exists in the theme file management API (/baser/api/admin/bc-theme-file/theme_files/add.json) that allows arbitrary file write. An authenticated administrator can include ../ sequences in the path parameter to create a PHP file in an arbitrary directory outside the theme directory, which may result in remote code execution (RCE). This issue has been patched in version 5.2.3.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
baserproject/basercmsPackagist | < 5.2.3 | 5.2.3 |
Affected products
2Patches
Vulnerability mechanics
References
5- github.com/baserproject/basercms/security/advisories/GHSA-c5c6-37vq-pjcqnvdExploitVendor AdvisoryWEB
- basercms.net/security/JVN_20837860nvdVendor AdvisoryWEB
- github.com/advisories/GHSA-c5c6-37vq-pjcqghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-30940ghsaADVISORY
- github.com/baserproject/basercms/releases/tag/5.2.3nvdRelease NotesWEB
News mentions
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