What’s Vulnerable › Vulnerabilities

CVE-2021-47838: Markright 1.0 - Persistent Cross-Site Scripting

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-16 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• dvcrn Markright: 1.0

References

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

Get alerted when CVE-2021-47838 or the next vulnerability affects your stack