CVE-2021-47963

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 v4.0

5.1 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

EPSS

0.47% chance of exploitation in the next 30 days, 39th percentile

Published

2026-05-15

Updated

2026-05-25

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/49836

References

• CVE Record
• NVD entry

Related

• CVE-2021-47962
• CVE-2021-47964
• CVE-2021-47959
• CVE-2021-47965
• CVE-2021-47958
• CVE-2021-47966