dbcve.org
Cross-site Scripting (XSS)Weakness · CWE-79

CVE-2025-53831

HIGH · 8.2 CVSS v3.1 Published 2026-07-06
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
86/100
Remediation priority · High
Remotely reachable 7 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
DrawIO for ownCloud is an application for using DrawIO with the file storage, synchronization, and sharing application ownCloud Classic. In DrawIO for ownCloud prior to version 1.0.2, which corresponds to ownCloud 10 prior to version 10.15.3, attackers with access to the DrawIO app can leverage improper neutralization of input during web page generation to achieve stored XSS. Upgrade ownCloud 10 to version 10.15.3 or later or upgrade DrawIO for ownCloud 10 to version 1.0.2 or later to receive a patch.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

This is a stored Cross-Site Scripting (XSS) vulnerability in the DrawIO for ownCloud app where user-supplied input is not properly sanitized during web page generation. Attackers with access to the DrawIO app can inject malicious JavaScript that executes in the browsers of other users viewing the affected pages.

MitigationUpgrade ownCloud 10 to version 10.15.3 or later, or upgrade DrawIO for ownCloud 10 to version 1.0.2 or later, to receive the patch that properly neutralizes input during web page generation.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm DrawIO for ownCloud app is installed
    Access the ownCloud admin panel and navigate to the Apps section to verify if the DrawIO app is listed among installed applications
    Affected if The DrawIO app appears in the installed apps list
  2. Identify the DrawIO for ownCloud version
    Within the ownCloud admin panel, view the details or market page for the DrawIO app to read the installed version number
    Affected if The installed version is earlier than 1.0.2
  3. Confirm ownCloud 10 is in use
    Check the ownCloud instance footer or admin overview page to verify the ownCloud server version
    Affected if Running ownCloud version 10.x (any minor version before 10.15.3)
  4. Verify the DrawIO app is enabled
    In the ownCloud admin panel Apps section, confirm the DrawIO app status shows as enabled for user access
    Affected if The app is enabled and accessible to users
  5. Review recent DrawIO diagrams for suspicious content
    Access the DrawIO app as a user and inspect recently created or edited diagrams, looking for unexpected script tags, event handlers, or encoded content in diagram metadata
    Affected if Any diagram contains unsanitized HTML or JavaScript in fields that render in the viewer

You are affected if DrawIO for ownCloud versions before 1.0.2 (or ownCloud 10 before 10.15.3) are installed with the app enabled, and users have created diagrams that may contain injected script content

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade ownCloud 10 to version 10.15.3 or later, or upgrade DrawIO for ownCloud 10 to version 1.0.2 or later, to receive the patch that properly neutralizes input during web page generation.

Recommended fix High confidence

ownCloud 10.15.3+ or DrawIO for ownCloud 1.0.2+

  1. Identify which component to upgrade: either ownCloud 10 server or the DrawIO for ownCloud app (or both)
  2. If upgrading ownCloud 10: Upgrade to version 10.15.3 or later by following ownCloud's upgrade documentation
  3. If upgrading DrawIO for ownCloud app: Upgrade to version 1.0.2 or later through the ownCloud apps management interface or package manager
  4. After upgrade, verify the installed version meets the minimum fixed version
  5. Confirm the DrawIO app functions normally after the upgrade

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,390
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-53831 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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