CVE-2025-53830Network attack vectorHinoki check available

Admin-level code execution via unverified ClamAV service

Published Jul 6, 2026 · Updated Jul 6, 2026

SSRF in ownCloud Anti-Virus before 1.2.3 and ownCloud Classic before 10.15.3 lets remote authenticated users execute code. Daemon::initScanner connects to the administrator-supplied antivirus host and streams file content without first verifying that the peer is a ClamAV service. Administrative privileges and daemon mode are required; exploitation sends server-side requests to the selected endpoint and executes arbitrary code in the server context.

CVSS severity9.1
Critical
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

SSRF in ownCloud Anti-Virus before 1.2.3 and ownCloud Classic before 10.15.3 lets remote authenticated users execute code. Daemon::initScanner connects to the administrator-supplied antivirus host and streams file content without first verifying that the peer is a ClamAV service. Administrative privileges and daemon mode are required; exploitation sends server-side requests to the selected endpoint and executes arbitrary code in the server context.

The record

CVE
CVE-2025-53830
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
ownCloud
Product
ownCloud Classic
Classifications
CWE-918, CAPEC-664, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 10.15.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ownCloud · ownCloud Classicversion=< 10.15.3
ownCloud · Anti-Virus for ownCloudversion=< 1.2.3

Published CVSS scores

9.1GitHub CNACVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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