CVE-2021-47838

MEDIUM EPSS 32.7%
Published Jan 16, 20265mo ago · Modified Jun 17, 20261w ago
5.1 CVSS 4.0
Medium
Find Similar
Published Jan 16, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago

Description

Markright 1.0 contains a persistent cross-site scripting vulnerability that allows attackers to embed malicious payloads in markdown files. Attackers can upload specially crafted markdown files that execute arbitrary JavaScript when opened, potentially enabling remote code execution on the victim's system.

CVSS Details

Base Score
5.1
Exploitability
—
Impact
—
Vector string
CVSS: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
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
32.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 4

  • github.com https://github.com/dvcrn/markright
  • imgur.com https://imgur.com/a/VOsgKbZ
  • exploit-db.com https://www.exploit-db.com/exploits/49834
  • vulncheck.com https://www.vulncheck.com/advisories/markright-persistent-cross-site-scripting

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.