Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS14bTU5LWp2eG0tY3Azds4AAhJL

mxGraph vulnerable to cross-site scripting in color field

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):

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

Permalink: https://github.com/advisories/GHSA-xm59-jvxm-cp3v
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS14bTU5LWp2eG0tY3Azds4AAhJL
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: almost 2 years ago
Updated: 7 months ago

CVSS Score: 6.1
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Identifiers: GHSA-xm59-jvxm-cp3v, CVE-2019-13127
References:

• https://nvd.nist.gov/vuln/detail/CVE-2019-13127
• https://github.com/jgraph/mxgraph/commit/76e8e2809b622659a9c5ffdc4f19922b7a68cfa3
• https://marketplace.atlassian.com/apps/1210933/draw-io-diagrams-for-confluence/version-history
• https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2019-032.txt
• https://github.com/advisories/GHSA-xm59-jvxm-cp3v

Repository: https://github.com/jgraph/mxgraph
Blast Radius: 14.6

Affected Packages