CVE-2020-9309
published 2020-07-15CVE-2020-9309: 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…
PriorityP347high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
1.84%
76.3th percentile
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.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| silverstripe | cms | 0 – 4.5.0 | — |
| silverstripe | mimevalidator | < 2.0.0 | 2.0.0 |
| silverstripe | recipe | >= 4.0.0 < 4.6.0 | 4.6.0 |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
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GHSA
Silverstripe CMS malicious file upload enables script execution
ghsa·2022-05-24
CVE-2020-9309 [HIGH] CWE-434 Silverstripe CMS malicious file upload enables script execution
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.
OSV
Silverstripe CMS malicious file upload enables script execution
osv·2022-05-24
CVE-2020-9309 [HIGH] Silverstripe CMS malicious file upload enables script execution
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2020-07-15
Published