CVE-2025-53830 owncloud CVE debrief

Who should care

Administrators and users of ownCloud 10 with Anti-Virus for ownCloud installed should prioritize upgrading to the fixed versions to prevent potential SSRF attacks. They should also review and restrict server-side request handling, monitor for suspicious server-side request activity, and consider compensating controls for exposed systems.

Technical summary

The CVE-2025-53830 vulnerability is classified as Server-Side Request Forgery (SSRF) and has a CVSS score of 9.1, indicating critical severity. It affects Anti-Virus for ownCloud versions before 1.2.3 and ownCloud 10 prior to 10.15.3. The vulnerability allows attackers to manipulate server-side requests, potentially leading to unauthorized access and data breaches. Defenders should review and restrict server-side request handling to prevent exploitation.

Defensive priority

High

Recommended defensive actions

• Upgrade ownCloud 10 to version 10.15.3 or later
• Upgrade Anti-Virus for ownCloud 10 to version 1.2.3 or later
• Review and restrict server-side request handling
• Monitor for suspicious server-side request activity
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-06T16:16:27.157Z and last modified on 2026-07-08T05:16:26.073Z. The NVD entry is currently Deferred. The vulnerability affects Anti-Virus for ownCloud versions before 1.2.3 and ownCloud 10 prior to 10.15.3. Evidence of exploitation is not currently available, but defenders should verify the affected scope and severity. The CVE record provides limited source detail, so further verification is necessary.

Official resources