Critical severity9.8GHSA Advisory· Published Apr 16, 2019· Updated Jun 17, 2026
CVE-2019-9845
CVE-2019-9845
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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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
MadsKristensen.AspNetCore.MiniblogNuGet | <= 1.0.3 | — |
Affected products
3- Range: <= 1.0.3
- cpe:2.3:a:miniblog.core_project:miniblog.core:*:*:*:*:*:*:*:*Range: <=2019-01-16
Patches
Vulnerability mechanics
References
5- rastating.github.io/miniblog-remote-code-execution/nvdExploitThird Party Advisory
- github.com/advisories/GHSA-958r-g534-ccmrghsaADVISORY
- github.com/madskristensen/Miniblog.Core/blob/master/src/Controllers/BlogController.csnvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2019-9845ghsaADVISORY
- rastating.github.io/miniblog-remote-code-executionghsaWEB
News mentions
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