Reflected Cross-Site Scripting Vulnerability in Nextcloud Server by Nextcloud
CVE-2021-22878

4.8MEDIUM

Key Information:

Vendor

Nextcloud
Status
Nextcloud Server
Vendor
CVE Published:
3 March 2021

What is CVE-2021-22878?

Nextcloud Server versions before 20.0.6 are susceptible to a reflected cross-site scripting (XSS) vulnerability. This issue arises from insufficient input sanitization in the OC.Notification.show function, allowing attackers to inject malicious scripts into the response. Unauthenticated users can exploit this flaw, potentially leading to unauthorized access, data manipulation, or other malicious activities. It is essential for users and administrators to upgrade to the latest version to mitigate this risk and enhance their security posture.

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Affected Version(s)

Nextcloud Server Fixed in 20.0.6

References

https://hackerone.com/reports/896522
x_refsource_MISC
https://nextcloud.com/security/advisory/?id=NC-SA-2021-005
x_refsource_MISC
https://github.com/nextcloud/server/pull/25234
x_refsource_MISC

CVSS V3.1

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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