What is the CVSS score of CVE-2025-53830?

CVE-2025-53830 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.3%.

Which versions of Owncloud are affected by CVE-2025-53830?

The Anti-Virus extension for ownCloud 10 (versions prior to 1.2.3) contains a Server-Side Request Forgery vulnerability (CVSS 9.1) exploitable only by authenticated high-privilege users, enabling…. A patch is available.

How to fix or mitigate CVE-2025-53830?

Within 24 hours: Audit all ownCloud 10.x deployments and identify instances with Anti-Virus extension version prior to 1.2.3. Within 7 days: Apply vendor patch-upgrade to Anti-Virus for ownCloud 1.2.3 or ownCloud 10.15.3 or later. Within 30 days: Review high-privilege account activity logs (last 90 days) for anomalous requests to internal IP addresses, localhost, or cloud metadata services.

Owncloud CVE-2025-53830

EUVD-2025-210434 CRITICAL

Server-Side Request Forgery (SSRF) (CWE-918)

2026-07-06 GitHub_M

SSRF Owncloud Owncloud 10 Anti Virus For Owncloud

9.1

CVSS 3.1 · Vendor: GitHub_M

Severity by source

Vendor (GitHub_M) PRIMARY

9.1 CRITICAL

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

Primary rating from Vendor (GitHub_M) · only source for this CVE.

CVSS VectorVendor: GitHub_M

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch available

Jul 06, 2026 - 17:01 EUVD

Analysis Generated

Jul 06, 2026 - 16:43 vuln.today

DescriptionCVE.org

Anti-Virus for ownCloud is an anti-virus application for file storage, synchronization, and sharing application ownCloud. Versions of Anti-Virus for ownCloud before 1.2.3 are vulnerable to Server-Side Request Forgery (SSRF). This corresponds to versions of ownCloud 10 prior to 10.15.3. Upgrade ownCloud 10 to version 10.15.3 or later or upgrade Anti-Virus for ownCloud 10 to version 1.2.3 or later to receive a fix.

AnalysisAI

Server-Side Request Forgery in the Anti-Virus for ownCloud extension (versions before 1.2.3, shipping with ownCloud 10 prior to 10.15.3) lets an authenticated high-privileged user coerce the server into issuing attacker-controlled requests, with a scope-changed CVSS of 9.1 reflecting reach into internal systems. The flaw was reported through ownCloud's security advisory program (GHSA-3wg4-mg27-hj4w); there is no public exploit identified at time of analysis and it is not listed in CISA KEV. A vendor-released patch exists: Anti-Virus for ownCloud 1.2.3 / ownCloud 10.15.3.