In short
- CVE-2019-9845 is a CRITICAL (CVSS 9.8) vulnerability affecting MadsKristensen.AspNetCore.Miniblog, miniblog.core (miniblog.core project).
- Chance of exploitation in the next 30 days (EPSS): 2.5%, higher than 85.0% of all vulnerabilities.
- No patched version is listed yet: follow the vendor's advisory in References.
Description
madskristensen Miniblog.Core through 2019-01-16 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in Controllers/BlogController.cs writes a decoded base64 string to a file without validating the extension.
NVD description
madskristensen Miniblog.Core through 2019-01-16 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in Controllers/BlogController.cs writes a decoded base64 string to a file without validating the extension.
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