CVE-2019-9842 - madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in app_code/handlers/PostHandler.cs writes a decoded base64 string to a file without validating the extension

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HIGH

madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in app_code/handlers/PostHandler.cs writes a decoded base64 string to a file without validating the extension

Published Jun 14, 2019

7.2

HIGH

CVSS 3.0

EPSS 2.16%

Description

madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in app_code/handlers/PostHandler.cs writes a decoded base64 string to a file without validating the extension.

Affected products

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-434

Unrestricted Upload of File

References (2)

https://github.com/madskristensen/MiniBlog/blob/1a7ae45ddba484e2c8f808e288e018748c9ddb57/Website/app_code/handlers/PostHandler.cs#L85
x_refsource_MISCThird Party Advisory
https://rastating.github.io/miniblog-remote-code-execution/
x_refsource_MISCExploitThird Party Advisory

Link	Providers	Tags
https://github.com/madskristensen/MiniBlog/blob/1a7ae45ddba484e2c8f808e288e018748c9ddb57/Website/app_code/handlers/PostHandler.cs#L85		x_refsource_MISCThird Party Advisory
https://rastating.github.io/miniblog-remote-code-execution/		x_refsource_MISCExploitThird Party Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Jun 14, 2019

Updated Aug 4, 2024

Reserved Mar 15, 2019

Link CVE-2019-9842

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2019-9842

Red Hat

Severity n/a

Public date n/a

Links CVE-2019-9842