What is CVE-2025-53827?

CVE-2025-53827 is a critical-severity vulnerability in ownCloud Core, classified under CWE-749. CVSS score: 9.1/10. Published 2026-07-06.

How severe is CVE-2025-53827?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in ownCloud Core

CVE-2025-53827

ownCloud Core is the server-side component of the file storage, synchronization, and sharing application ownCloud Classic. In versions prior to 10.15.3, the Updater on ownCloud 10 before 10.15.3 has an exposed dangerous method or function. Attackers with administrative privileges may leverage functionality to execute arbitrary code. This issue has been fixed in version 10.15.3.

EPSS: 0.004 (29.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Owncloud Core — versions < 10.15.3

Weakness classification (CWE)

CWE-749

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2025-53827?: CVE-2025-53827 is a critical-severity vulnerability in ownCloud Core, classified under CWE-749. CVSS score: 9.1/10. Published 2026-07-06.
How severe is CVE-2025-53827?: Critical severity. CVSS v3 base score is 9.1 out of 10.