CVE-2020-9309

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Summary

CVECVE-2020-9309
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-07-15 21:15:00 UTC
Updated2020-07-24 14:39:00 UTC
DescriptionSilverstripe 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.

Risk And Classification

Problem Types: CWE-434

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Silverstripe Mimevalidator All All All All
Application Silverstripe Mimevalidator All All All All
Application Silverstripe Recipe All All All All
Application Silverstripe Recipe All All All All

References

ReferenceSourceLinkTags
CVE-2020-9309 Script execution on protected files with MIME spoofing content » Silverstripe CMS CONFIRM www.silverstripe.org Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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