CVE-2023-35171

Public Exploit
Nextcloud Server vulnerable to open redirect on "Unsupported browser" warning

Description

NextCloud Server and NextCloud Enterprise Server provide file storage for Nextcloud, a self-hosted productivity platform. Starting in version 26.0.0 and prior to version 26.0.2, an attacker could supply a URL that redirects an unsuspecting victim from a legitimate domain to an attacker's site. Nextcloud Server and Nextcloud Enterprise Server 26.0.2 contain a patch for this issue. No known workarounds are available.

Category

4.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.34%
Vendor Advisory github.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h353-vvwv-j2r4 vendor advisory issue tracking exploit
https://github.com/nextcloud/server/pull/38194 patch issue tracking
https://hackerone.com/reports/1977222 exploit mitigation third party advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-35171?
CVE-2023-35171 has been scored as a medium severity vulnerability.
How to fix CVE-2023-35171?
To fix CVE-2023-35171, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-35171 being actively exploited in the wild?
It is possible that CVE-2023-35171 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-35171?
CVE-2023-35171 affects nextcloud security-advisories.
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