VDB
CVE-2026-30940
CVE-2026-30940
PUBLISHED
CVSS 7.199999809265137 HIGH
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.
EPSS 0.14% · 34.6th percentile
Risk Scores
CVSS 3.1
7.199999809265137
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.14%
34.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| baserproject | basercms | 0 |
| baserproject | basercms | *, < 5.2.3 |
| basercms | basercms | 0 |
Exploit Intelligence
- CIRCL published-proof-of-concept: CVE-2026-30940 (circl-sighting)
- CIRCL published-proof-of-concept: CVE-2026-30940 (circl-sighting)
- CIRCL seen: CVE-2026-30940 (circl-sighting)
- https://github.com/baserproject/basercms/security/advisories/GHSA-c5c6-37vq-pjcq (nist-nvd)
- CIRCL seen: CVE-2026-30940 (circl-sighting)
- https://basercms.net/security/JVN_20837860 (circl)
- https://github.com/baserproject/basercms/releases/tag/5.2.3 (circl)
Timeline
- Mar 30, 2026 PoC Published
- Mar 30, 2026 PoC Published
- Mar 31, 2026 CVE Published
- Mar 31, 2026 PoC Published
- Apr 1, 2026 Security Advisory
- Apr 4, 2026 PoC Published
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score