CVE-2021-47840

Moeditor 0.2.0 contains a persistent cross-site scripting vulnerability that allows attackers to store malicious payloads within markdown files. Attackers can upload specially crafted markdown files with embedded JavaScript that execute when opened, potentially enabling remote code execution on the victim's system.

CVSS v4.0

5.1 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/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

0.42% chance of exploitation in the next 30 days, 35th percentile

Published

2026-01-16

Proof-of-concept exploits (2)

• https://www.exploit-db.com/exploits/49830
• https://imgur.com/a/UdP4JaX

References

• CVE Record
• NVD entry

Related

• CVE-2021-47839
• CVE-2021-47841
• CVE-2021-47838
• CVE-2021-47842
• CVE-2021-47837
• CVE-2021-47843