Is CVE-2025-53831 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-53831 being exploited in the wild.

How severe is CVE-2025-53831?

High severity, with a CVSS score of 8.2, published 6 July 2026.

Which products and versions are affected?

ownCloud DrawIO for ownCloud 10 < 1.0.2; ownCloud Classic < 10.15.3.

Is there a fix for CVE-2025-53831?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2025-53831 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2025-53831?

Check whether you run ownCloud DrawIO for ownCloud 10 or ownCloud Classic at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2025-53831: ownCloud DrawIO stored XSS in web page generation

Q: Is there a fix for CVE-2025-53831?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Q: How is CVE-2025-53831 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2025-53831?

Check whether you run ownCloud DrawIO for ownCloud 10 or ownCloud Classic at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2025-53831 · Severity: high · CVSS 8.2 · Published 2026-07-06

DrawIO for ownCloud is an integration that allows users to create and edit diagrams within the ownCloud file storage platform. A security flaw allows an attacker to inject malicious scripts into diagrams that, when viewed by other users, could lead to unauthorized data access or account takeover. Organizations using ownCloud 10 should update their software or the DrawIO application to the latest versions to prevent this risk.

Vendors: ownCloud.

Quick answers

Is CVE-2025-53831 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2025-53831 being exploited in the wild.
How severe is CVE-2025-53831?: High severity, with a CVSS score of 8.2, published 6 July 2026.
Which products and versions are affected?: ownCloud DrawIO for ownCloud 10 < 1.0.2; ownCloud Classic < 10.15.3.
Is there a fix for CVE-2025-53831?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2025-53831 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2025-53831?: Check whether you run ownCloud DrawIO for ownCloud 10 or ownCloud Classic at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stored cross-site scripting (XSS) vulnerability exists in the DrawIO application for ownCloud Classic. The flaw is caused by improper neutralization of user-controllable input during web page generation (CWE-79). An authenticated attacker with access to the DrawIO app can upload or modify a diagram containing malicious scripts. When a victim views the affected diagram, the script executes in their browser context, potentially allowing the attacker to steal session cookies or perform actions on behalf of the victim. The issue is resolved in DrawIO for ownCloud version 1.0.2 and ownCloud Classic version 10.15.3.

Affected products

ownCloud DrawIO for ownCloud 10 < 1.0.2
ownCloud ownCloud Classic < 10.15.3

Timeline

2026-06-24: advisory: Initial disclosure by ownCloud security team
2026-07-06: disclosed: NVD publication date

References

https://github.com/owncloud/security-advisories/security/advisories/GHSA-r9j8-fr2h-m47q

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