CVE-2023-28643

Name: CVE-2023-28643
Creator: NVD / NIST
Published: 2023-03-30T19:15:06.607+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.79%

Last modified Jun 17, 2026

CVE-2023-28643 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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)`. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.79%

51.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	>= 24.0.0, < 24.0.9
Nextcloud	Nextcloud Server	>= 25.0.0, < 25.0.3

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhq4-4pr8-wm27Vendor Advisory
https://github.com/nextcloud/server/issues/34015Exploit, Issue Tracking
https://github.com/nextcloud/server/pull/36047Issue Tracking, Patch
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhq4-4pr8-wm27Vendor Advisory
https://github.com/nextcloud/server/issues/34015Exploit, Issue Tracking
https://github.com/nextcloud/server/pull/36047Issue Tracking, Patch

Timeline

Published: Mar 30, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-28643?

How severe is CVE-2023-28643?

CVE-2023-28643 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2023-28643?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-28643?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST