CVE-2021-47842

StudyMD 0.3.2 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts into markdown files. Attackers can upload crafted markdown files with embedded JavaScript payloads that execute when the file is opened, potentially enabling remote code execution.

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/49832
• https://imgur.com/a/lDHKEIp

References

• CVE Record
• NVD entry

Related

• CVE-2021-47841
• CVE-2021-47843
• CVE-2021-47840
• CVE-2021-47844
• CVE-2021-47839
• CVE-2021-47845