What is CVE-2025-53831?

CVE-2025-53831 is a high-severity vulnerability in ownCloud Drawio For, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-07-06.

How severe is CVE-2025-53831?

High severity. CVSS v3 base score is 8.2 out of 10.

XSS in ownCloud Drawio For

CVE-2025-53831

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (6.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L.

Affected products

Owncloud Drawio For — versions < 1.0.2
Owncloud 10 — versions < 10.15.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2025-53831?: CVE-2025-53831 is a high-severity vulnerability in ownCloud Drawio For, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-07-06.
How severe is CVE-2025-53831?: High severity. CVSS v3 base score is 8.2 out of 10.