CVE-2023-25821

Name: CVE-2023-25821
Creator: NVD / NIST
Published: 2023-02-25T00:15:11.093+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.95%

Last modified Jun 17, 2026

CVE-2023-25821 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Nextcloud is an Open Source private cloud software. Versions 24.0.4 and above, prior to 24.0.7, and 25.0.0 and above, prior to 25.0.1, contain Improper Access Control. EPSS estimates a 0.95% chance of exploitation in the next 30 days.

Description

Nextcloud is an Open Source private cloud software. Versions 24.0.4 and above, prior to 24.0.7, and 25.0.0 and above, prior to 25.0.1, contain Improper Access Control. Secure view for internal shares can be circumvented if reshare permissions are also given. This issue is patched in versions 24.0.7 and 25.0.1. No workaround is available.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.95%

56.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	>= 24.0.4, < 24.0.7
Nextcloud	Nextcloud Server	25.0.0

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w6h-5qgw-4j94Vendor Advisory
https://github.com/nextcloud/server/pull/34502Patch
https://hackerone.com/reports/1724016Exploit, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w6h-5qgw-4j94Vendor Advisory
https://github.com/nextcloud/server/pull/34502Patch
https://hackerone.com/reports/1724016Exploit, Third Party Advisory

Timeline

Published: Feb 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-25821?

How severe is CVE-2023-25821?

CVE-2023-25821 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.95% probability of exploitation in the next 30 days.

How do I fix CVE-2023-25821?

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-2023-25821?

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

Scan your code now

Source: NVD / NIST