Vulnerability · Published Jul 6, 2026 · Assigned by GitHub_M

CVE-2025-53831DrawIO for ownCloud 10 is vulnerable to Stored XSS

High 8.2

In plain English

A high-severity cross-site scripting in DrawIO for ownCloud from owncloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)0.3%top 79.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
owncloud	DrawIO for ownCloud	< 1.0.2
owncloud	ownCloud 10	< 10.15.3

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L

References

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