CVE-2020-15159Cross Site Scripting leading to RCE in baserCMS
- 7.6HighCVSS base score
- 2.2%Exploitation in 30 daysEPSS · top 18% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By GitHub_M
- 2 months later
· 2 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.6 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.6 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 2.2% · top 18% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.6.
Affected products
- affected unspecified – < < 4.3.7
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistbaserproject/basercmsGHSA-673x-f5wx-fxpw (opens in a new tab)
References
References3
- https://basercms.net/security/20200827 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/baserproject/basercms/security/advisories/GHSA-673x-f5wx-fxpw (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/baserproject/basercms/commit/16a7b3cd09a0ca355474119c76897eac2034a66d (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-0597 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-673x-f5wx-fxpw (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-15159)Record last updated .