CVE-2021-47963

HIGH

Anote 1.0 Persistent Cross-Site Scripting Remote Code Execution

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47963. PoCs published by TaurusOmar.

AI-analyzed exploit summary This exploit demonstrates a persistent XSS vulnerability in Anote 1.0, where malicious JavaScript payloads can be embedded in markdown files. The payload executes arbitrary commands (e.g., reverse shell) when the file is opened, leveraging the application's markdown rendering to achieve RCE.

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.

Exploits (1)

exploitdb WORKING POC
by TaurusOmar · javascriptwebappsmultiple
https://www.exploit-db.com/exploits/49836

This exploit demonstrates a persistent XSS vulnerability in Anote 1.0, where malicious JavaScript payloads can be embedded in markdown files. The payload executes arbitrary commands (e.g., reverse shell) when the file is opened, leveraging the application's markdown rendering to achieve RCE.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Moderate
Reliability
Reliable
Target: Anote 1.0
No auth needed
Prerequisites: Victim must open a malicious markdown file in Anote
devstral-2 · analyzed May 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit exploit
ExploitDB-49836
https://www.exploit-db.com/exploits/49836
Product product
Official Product Homepage
https://github.com/AnotherNote/anote
Third Party Advisory third-party-advisory
VulnCheck Advisory: Anote 1.0 Persistent Cross-Site Scripting Remote Code Execution
https://www.vulncheck.com/advisories/anote-persistent-cross-site-scripting-remote-code-execution

Scores

CVSS v3 7.2
EPSS 0.0003
EPSS Percentile 8.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
AnotherNote/Anote 1.0
Published May 15, 2026
Tracked Since May 16, 2026