CVE-2021-47963

Anote 1.0 Persistent Cross-Site Scripting Leading to Code Execution

CVSS 5.1 MEDIUMEPSS 0.5%CWE-79

Vexday Risk Score

33Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 5.1EPSS 0.5%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

15 May 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

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

Affected products

AnotherNote · Anote

public PoCs found — 1

cve_referencewww.exploit-db.com/exploits/49836unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

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