CVE-2025-56683 Cross-site scripting in n/a
Attackers can execute arbitrary code by injecting JavaScript into a crafted README.md file viewed in the Logseq marketplace.
- 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-2025-56683?
CVE-2025-56683 is a critical cross-site scripting vulnerability in n/a, published on 9 Oct 2025. 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
A cross-site scripting (XSS) vulnerability in the component /app/marketplace.html of Logseq v0.10.9 allows attackers to execute arbitrary code via injecting arbitrary Javascript into a crafted README.md file.
Weakness: CWE-79
Which versions are affected by CVE-2025-56683?
How do I fix CVE-2025-56683?
No fix has been published for CVE-2025-56683 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-2025-56683 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-56683 exists.
Sources
Also known as GHSA-r59m-r63f-42wc.