CVE-2026-115481
CVE-2026-115481 · baserCMS: BcCustomContent file fields can be configured to allow executable file extensions such as php, leading to arbitrary PHP file upload
This page contains facts from public vulnerability sources. Check the original advisory before updating.
baserCMS is a website development framework. Starting in version 5.0.0-beta1 and prior to versions 5.3.2 and 5.4.2, `PermissionGroupsService::build()` reads a plugin's `config/permission.php` to decide what each user group may reach. When that file is absent it writes a wildcard allow rule instead: `url` `/baser/<prefix>/<plugin>/*`, `method` `*`, `auth` true, for every non-admin group. BcCustomContent has no such file in any release. After an administrator installs it, the default `operators` group can store and execute arbitrary PHP under the document root. Versions 5.3.2 and 5.4.2 patch the issue.
CVSS 8.5 · High
- Published
- Updated
Affected products and versions
basercms
- Versions
- >= 5.0.0-beta1, < 5.3.2: Affected
- >= 5.4.0, < 5.4.2: Affected
No fix published
Original sources
- https://github.com/baserproject/basercms/security/advisories/GHSA-8jrp-4h7c-m679
- https://github.com/baserproject/basercms/commit/2ed19c878add5c26fc765572e0e77173c1f1fdb5
- https://github.com/baserproject/basercms/commit/b0ef31b10dc6267b48ebc9a80d34bc7c4c09c311
- https://github.com/baserproject/basercms/releases/tag/5.3.2
- https://github.com/baserproject/basercms/releases/tag/5.4.2
- https://nvd.nist.gov/vuln/detail/CVE-2026-115481