MadsKristensen.AspNetCore.Miniblog subject to Improper Input Validation

GHSA-958r-g534-ccmr · CVE-2019-9845

Published Jul 5, 2019 · Modified Feb 19, 2024

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.

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2019-9845
ADVISORY https://github.com/advisories/GHSA-958r-g534-ccmr
PACKAGE https://github.com/madskristensen/Miniblog.Core
WEB https://github.com/madskristensen/Miniblog.Core/blob/master/src/Controllers/BlogController.cs#L142
WEB https://rastating.github.io/miniblog-remote-code-execution

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