Medium severity · published Dec 30, 2020
CVE-2020-5810
A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current
5.4
CVSS
62%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)62.0% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UC
Umbraco CMS ·
<= 8.9.1 or current (unfixed) · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5810
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-5810
Exploit
https://www.tenable.com/security/research/tra-2020-59
More from Umbraco CMS
6.5
CVE-2020-5811
An authenticated path traversal vulnerability exists during package installation in Umbraco CMS <= 8.9.1 or current, which could result in arbitrary files being written outside of…
5.4
CVE-2020-5809
A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current