CVE-2020-5810
CVE-2020-5810 is a medium-severity vulnerability in Umbraco Umbraco Cms with a CVSS 3.x base score of 5.4. Its EPSS exploit-prediction score of 66% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 5.4)
- CVSS v2: 3.5
- EPSS exploit prediction: 66% (99th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Umbraco Umbraco Cms
- Published:
- Last modified:
Description
A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current. An authenticated user authorized to upload media can upload a malicious .svg file which act as a stored XSS payload.
Frequently asked questions
- What is CVE-2020-5810?
- A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current. An authenticated user authorized to upload media can upload a malicious .svg file which act as a stored XSS payload.
- How severe is CVE-2020-5810?
- CVE-2020-5810 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2020-5810 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 66% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-5810?
- CVE-2020-5810 affects Umbraco Umbraco Cms. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-5810?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-5810 published?
- CVE-2020-5810 was published on 2020-12-30 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*
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