CVE-2025-53828Network attack vectorHinoki check available

Administrative code execution via server-side request forgery

Published Jul 6, 2026 · Updated Jul 6, 2026

SSRF in SharePoint for ownCloud before 0.4.1 and ownCloud Classic before 10.15.3 allows remote authenticated users to execute code. The SharePoint app sends a server-side request without sufficiently restricting its destination, but the vulnerable endpoint and function are undisclosed. Administrative privileges are required, and successful exploitation executes arbitrary code on the ownCloud host.

CVSS severity8.5
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SSRF in SharePoint for ownCloud before 0.4.1 and ownCloud Classic before 10.15.3 allows remote authenticated users to execute code. The SharePoint app sends a server-side request without sufficiently restricting its destination, but the vulnerable endpoint and function are undisclosed. Administrative privileges are required, and successful exploitation executes arbitrary code on the ownCloud host.

The record

CVE
CVE-2025-53828
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
ownCloud
Product
ownCloud Classic
Classifications
CWE-918, 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 · SharePoint for ownCloudversion=< 0.4.1

Published CVSS scores

8.5GitHubCVSS:3.1/AV:N/AC:H/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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)
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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