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GHSA-xm59-jvxm-cp3v
No affected components available
mxGraph through 4.0.0, related to the draw.io Diagrams 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):
- Create a new draw.io Diagram, add an element and edit its background color and enter some text to the element
- Enter the following "color":
onMouseOver=alert(1) a= - Save and view the resulting diagram, moving your mouse over the text
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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