How severe is CVE-2019-9845?

CVE-2019-9845 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-9845 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-9845?

CVE-2019-9845 affects Miniblog.core Project Miniblog.core. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-9845?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-9845 published?

CVE-2019-9845 was published on 2019-04-16 and last updated on 2026-06-17.

CVE-2019-9845

CVE-2019-9845 is a critical-severity vulnerability in Miniblog.core Project Miniblog.core with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Miniblog.core Project Miniblog.core
Published: 2019-04-16
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2019-9845?: CVE-2019-9845 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-9845 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-9845?: CVE-2019-9845 affects Miniblog.core Project Miniblog.core. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-9845?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-9845 published?: CVE-2019-9845 was published on 2019-04-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:miniblog.core_project:miniblog.core:*:*:*:*:*:*:*:*

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