CVE-2019-9845

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.

CVSS v3.0 NVD

9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

2.53% chance of exploitation in the next 30 days, 85th percentile

Published

2019-04-16

Updated

2024-08-04

Proof-of-concept exploits (1)

• https://rastating.github.io/miniblog-remote-code-execution/

Security advisories

• madskristensen/Miniblog.Core/blob/master/src/Controllers/BlogController.cs#L142
• https://rastating.github.io/miniblog-remote-code-execution
• advisories/GHSA-958r-g534-ccmr

References

• CVE Record
• NVD entry