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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

criticalCVSS 9.1CVE-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.

Details

Source
NVD Recent CVEs (US · database · site)
Severity
critical — CVSS 9.1
Published
2026-07-06
Last updated
2026-07-08
Exploitation
Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-53827

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-53827coverage & exploitation statusNVD · CVE.org

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