What’s Vulnerable › Vulnerabilities

CVE-2019-9845

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-04-16 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• Miniblog.Core Project Miniblog.Core: through 2019-01-16

References

• https://github.com/madskristensen/Miniblog.Core/blob/master/src/Controllers/BlogController.cs#L142
• https://rastating.github.io/miniblog-remote-code-execution/
• https://github.com/madskristensen/Miniblog.Core/blob/master/src/Controllers/BlogController.cs#L142
• https://rastating.github.io/miniblog-remote-code-execution/

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