CVE-2019-13127
mxGraph vulnerable to cross-site scripting in color field
Description
mxGraph through 4.0.0, related to the [draw.io Diagrams](https://github.com/jgraph/drawio) plugin before 8.3.14 for Confluence and other products, is vulnerable to cross-site scripting. draw.io Diagrams allows the creation and editing of draw.io-based diagrams in Confluence. Among other things, it allows to set the background color of text displayed in the diagram. The color provided by the user is notproperly sanitized, leading to HTML and JavaScript code to be displayed "as it is" to visitors of the page. This allows attackers to execute JavaScript code in the context of the visitor's browser and session and to e.g. run Confluence command under the visitor's user or attack the visitor's browser. **Proof of Concept (PoC):** 1. Create a new draw.io Diagram, add an element and edit its background color and enter some text to the element 2. Enter the following "color": `onMouseOver=alert(1) a=` 3. Save and view the resulting diagram, moving your mouse over the text
How to fix CVE-2019-13127
To remediate CVE-2019-13127, upgrade the affected package to a fixed version below.
- —upgrade to 4.0.1 or later
Is CVE-2019-13127 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 4.0.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |