CVE-2021-47963 Anote 1.0 Persistent Cross-Site Scripting Leading to Code Execution
Attackers can execute arbitrary code on victims' computers by injecting malicious JavaScript into markdown files within the Anote application.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-47963?
CVE-2021-47963 is a medium-severity cross-site scripting vulnerability in AnotherNote Anote, published on 15 May 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Anote 1.0 contains a persistent cross-site scripting vulnerability that allows attackers to execute arbitrary code by injecting malicious payloads into markdown files stored within the application. Attackers can craft malicious markdown files with embedded JavaScript that executes system commands when opened, enabling remote code execution on the victim's computer.
Weakness: CWE-79
Which versions are affected by CVE-2021-47963?
How do I fix CVE-2021-47963?
No fix has been published for CVE-2021-47963 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-2021-47963 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47963 exists.
Sources
Also known as GHSA-m43r-r9f5-m97p.