Cross Site Scripting in baserCMS
Priority MEDIUM 40CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
baserCMS before version 4.4.1 is vulnerable to Cross-Site Scripting. Arbitrary JavaScript may be executed by entering a crafted nickname in blog comments. The issue affects the blog comment component. It is fixed in version 4.4.1.
Why it matters now
EPSS 0.01002 63rd percentileScored 2026-11-07
Fix Fixed basercms (baserproject): 4.4.1baserproject/basercms (Packagist): 4.4.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| baserproject | basercms | 4.0.0 to before 4.4.1 | 4.4.1 | Patch available | CNA |
| — | baserproject/basercms (Packagist) | 4.4.0 to before 4.4.1 | 4.4.1 | Patch available | GHSA-fw5q-j9p4-3vxg |
- basercms Vendorbaserproject Affected 4.0.0 to before 4.4.1 Fixed in 4.4.1 Patch available CNA
- baserproject/basercms (Packagist) Vendor— Affected 4.4.0 to before 4.4.1 Fixed in 4.4.1 Patch available GHSA-fw5q-j9p4-3vxg
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:* | 4.0.0 to before 4.4.1 | Vulnerable | baserproject |
- cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:* Versions 4.0.0 to before 4.4.1 Vulnerable ·baserproject
Remediation
- Fix · CNA basercms (baserproject) Fixed in 4.4.1
- Fix · GHSA-fw5q-j9p4-3vxg baserproject/basercms (Packagist) Fixed in 4.4.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-15276
- 2026-10-03 Alias added: GHSA-fw5q-j9p4-3vxg
References
More baserproject Basercms vulnerabilities
- TI-2026-17563 baserCMS: OS Command Injection Leading to Remote Code Execution (RCE) CVSS 3.1CRITICAL 9.1
- TI-2025-23967 baserCMS: unsafe File Upload Leading to Remote Code Execution (RCE) CVSS 3.1HIGH 8.7
- TI-2026-23707 baserCMS: Mail Form Acceptance Bypass via Public API CVSS 3.1MEDIUM 5.3
- TI-2023-10935 baserCMS File Uploader Remote Code Execution (RCE) vulnerability CVSS 3.1CRITICAL 9.8
- TI-2023-10936 baserCMS allows any file to be uploaded CVSS 3.1CRITICAL 9.8
- TI-2023-23483 baserCMS Code Injection Vulnerability in Mail Form Feature CVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-15276 · CVE Program
- CVE-2020-15276 · NVD
- FIRST EPSS
- GHSA-fw5q-j9p4-3vxg · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences