CVE-2020-15159 json
Cross Site Scripting leading to RCE in baserCMS
published 2020-08-28 6 y ago modified 2026-09-10 1 mo ago also GHSA-673x-f5wx-fxpw , EUVD-2020-0597
- cvss
- 7.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.2%
- EPSS 2.2% chance of exploitation in 30 days, percentile 82%
- public exploits
- 0
- none known
Summary
baserCMS 4.3.6 and earlier is affected by Cross Site Scripting (XSS) and Remote Code Execution (RCE). This may be executed by logging in as a system administrator and uploading an executable script file such as a PHP file.The affected components are ThemeFilesController.php and UploaderFilesController.php. This is fixed in version 4.3.7.
Patch / fix
- packagist baserproject/basercms 4.3.7
- baserproject basercms < 4.3.7
Exploit prediction
2.15% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:N/AC:H/Au:S/C:P/I:P/A:P |
| GitHub | 3.1 | 7.6 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | baserproject/basercms | >=4.0.0, <4.3.7 |
4.3.7 |
Affected products
- baserproject basercms
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/baserproject/basercms/commit/16a7b3cd09a0ca355474119c76897eac2034a66d
web, patch, third-party-advisory
-
github.com
/baserproject/basercms/security/advisories/GHSA-673x-f5wx-fxpw
web, patch, third-party-advisory
-
basercms.net
/security/20200827
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-15159
advisory
Sources
- CVE List CVE-2020-15159
- GitHub Advisory GHSA-673x-f5wx-fxpw
- NVD CVE-2020-15159
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.