CVE-2023-3973 Cross-site Scripting (XSS) - Reflected in jgraph/drawio

Critical 9.6 Published 27 Jul 2023 Updated 15 Oct 2024

Attackers can execute arbitrary scripts in victims' browsers via reflected XSS in drawio, potentially leading to session hijacking or data theft.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-3973?

CVE-2023-3973 is a critical cross-site scripting vulnerability in jgraph/drawio, published on 27 Jul 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Cross-site Scripting (XSS) - Reflected in GitHub repository jgraph/drawio prior to 21.6.3.

Weakness: CWE-79

Which versions are affected by CVE-2023-3973?

It affects 1 product.

Products include Diagrams Drawio.

How do I fix CVE-2023-3973?

No fix has been published for CVE-2023-3973 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2023-3973 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-3973 exists.

Sources

Also known as GHSA-jgm3-jg5h-p97h.