Advisory details:
github_osv / GHSA-h77w-655f-6j3m
| Advisory ID | github_osv/GHSA-h77w-655f-6j3m |
| Aliases |
CVE-2020-9309
|
| Summary | Silverstripe CMS malicious file upload enables script execution Silverstripe CMS through 4.5 can be susceptible to script execution from malicious upload contents under allowed file extensions (for example HTML code in a TXT file). When these files are stored as protected or draft files, the MIME detection can cause browsers to execute the file contents. Uploads stored as protected or draft files are allowed by default for authorised users only, but can also be enabled through custom logic as well as modules such as silverstripe/userforms. Sites using the previously optional silverstripe/mimevalidator module can configure MIME whitelists rather than extension whitelists, and hence prevent this issue. Sites on the Common Web Platform (CWP) use this module by default, and are not affected. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 7.9 |
| Risk | 4.0 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 8.8 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-h77w-655f-6j3m/GHSA-h77w-655f-6j3m.json |
| generic_textual | HIGH |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/silverstripe/silverstripe-cms | ||
| CVE-2020-9309 | https://nvd.nist.gov/vuln/detail/CVE-2020-9309 | |
| CVE-2020-9309 | https://www.silverstripe.org/download/security-releases/CVE-2020-9309 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
There are no SSVC decisions available.