CVE-2026-30877 json
baserCMS: OS Command Injection in the baserCMS Update Functionality
published 2026-03-31 7 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-17259 , GHSA-m9g7-rgfc-jcm7
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 75%
- public exploits
- 0
- none known
Summary
baserCMS is a website development framework. Prior to version 5.2.3, there is an OS command injection vulnerability in the update functionality. Due to this issue, an authenticated user with administrator privileges in baserCMS can execute arbitrary OS commands on the server with the privileges of the user account running baserCMS. This issue has been patched in version 5.2.3.
Patch / fix
- packagist baserproject/basercms 5.2.3
- basercms basercms 5.2.3
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction
1.54% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| GitHub | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | baserproject/basercms | <5.2.3 |
5.2.3 |
Affected products
- baserproject basercms
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
-
github.com
/baserproject/basercms/security/advisories/GHSA-m9g7-rgfc-jcm7
web, vendor-advisory
-
basercms.net
/security/JVN_20837860
web, vendor-advisory
-
github.com
/baserproject/basercms/releases/tag/5.2.3
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-30877
advisory
-
github.com
/baserproject/basercms
package
Sources
- CVE List CVE-2026-30877
- GitHub Advisory GHSA-m9g7-rgfc-jcm7
- NVD CVE-2026-30877
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.