CVE-2020-9471
CVE-2020-9471 is a high-severity vulnerability in Umbraco Umbraco Cms with a CVSS 3.x base score of 8.8. 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-434.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.5
- EPSS exploit prediction: 2% (81st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-434
- Affected product: Umbraco Umbraco Cms
- Published:
- Last modified:
Description
Umbraco Cloud 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Packages functionality.
Frequently asked questions
- What is CVE-2020-9471?
- Umbraco Cloud 8.5.3 allows an authenticated file upload (and consequently Remote Code Execution) via the Install Packages functionality.
- How severe is CVE-2020-9471?
- CVE-2020-9471 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-9471 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-9471?
- CVE-2020-9471 affects Umbraco Umbraco Cms. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-9471?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-9471 published?
- CVE-2020-9471 was published on 2020-03-16 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:umbraco:umbraco_cms:8.5.3:*:*:*:*:*:*:*
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