Medium severity · published Nov 21, 2023
CVE-2023-48302
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform
5.4
CVSS
0.6%
EPSS
No
On KEV
Description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Server and Nextcloud Enterprise Server, when a user is tricked into copy pasting HTML code without markup (Ctrl+Shift+V) the markup will actually render. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.13, 26.0.8, and 27.1.3 contain a fix for this issue. As a workaround, disable app text.
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)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
25.0.0 before 25.0.13; 25.0.0 before 25.0.13; 26.0.0 before 26.0.8; 26.0.0 before 26.0.8; 27.0.0 before 27.1.3; 27.0.0 before 27.1.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-48302
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-48302
Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p7g9-x25m-4h87
Patch
https://github.com/nextcloud/text/pull/4877
Permissions Required
https://hackerone.com/reports/2211561
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