CVE-2026-115481
baserCMS is a website development framework
- Risk score
- 59/100
- CVSS
- 8.5 v4.0
- Exploit chance (30 days)
- 0.5%
- Published
- 23 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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>/<pl…
- Affected
- See advisory
- Fix
- Upgrade the product to 5.3.2 or 5.4.2 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 8.5 high
References
- 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://github.com/baserproject/basercms/security/advisories/GHSA-8jrp-4h7c-m679
Original description
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.
Last activity 23 Oct 2026. Patch Forecast updates every hour.