Cross-site scripting in baserproject baserCMS
Priority LOW 26CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Improper neutralization of JavaScript input in the page editing function of baserCMS versions prior to 4.4.5 allows remote authenticated attackers to inject an arbitrary script via unspecified vectors.
Why it matters now
EPSS 0.00731 54th percentileScored 2026-11-07
Fix Fixed baserCMS (baserCMS Users Community): 4.4.5baserproject/basercms (Packagist): 4.4.5
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 | before 4.4.5 | 4.4.5 | Patch available | CNA |
| — | baserproject/basercms (Packagist) | before 4.4.5 | 4.4.5 | Patch available | GHSA-24p5-x9f9-vvpx |
- baserCMS Vendorbaserproject Affected before 4.4.5 Fixed in 4.4.5 Patch available CNA
- baserproject/basercms (Packagist) Vendor— Affected before 4.4.5 Fixed in 4.4.5 Patch available GHSA-24p5-x9f9-vvpx
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:* | before 4.4.5 | Vulnerable | baserproject |
- cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:* Versions before 4.4.5 Vulnerable ·baserproject
Remediation
- Fix · CNA baserCMS (baserCMS Users Community) Fixed in 4.4.5
- Fix · GHSA-24p5-x9f9-vvpx baserproject/basercms (Packagist) Fixed in 4.4.5 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20681
- 2026-10-03 Alias added: GHSA-24p5-x9f9-vvpx
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-2021-20681 · CVE Program
- CVE-2021-20681 · NVD
- FIRST EPSS
- GHSA-24p5-x9f9-vvpx · GitHub Advisory Database · CC BY 4.0
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