CVE-2023-28643

Public Exploit
Potential share collision for recipients when caching is enabled in nextcloud server

Description

Nextcloud server is an open source home cloud implementation. In affected versions when a recipient receives 2 shares with the same name, while a memory cache is configured, the second share will replace the first one instead of being renamed to `{name} (2)`. It is recommended that the Nextcloud Server is upgraded to 25.0.3 or 24.0.9. Users unable to upgrade should avoid sharing 2 folders with the same name to the same user.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.56%
Vendor Advisory github.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhq4-4pr8-wm27 vendor advisory
https://github.com/nextcloud/server/issues/34015 issue tracking exploit
https://github.com/nextcloud/server/pull/36047 patch issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-28643?
CVE-2023-28643 has been scored as a medium severity vulnerability.
How to fix CVE-2023-28643?
To fix CVE-2023-28643, 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-2023-28643 being actively exploited in the wild?
It is possible that CVE-2023-28643 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-28643?
CVE-2023-28643 affects nextcloud security-advisories.
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