PT-2026-3293 · Markright · Markright

Taurusomar · Published 2026-01-16 · Updated 2026-01-16 · CVE-2021-47838

Positive Technologies (AI Summary)

CVSS v3.1

7.2

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Markright version 1.0

Description Markright is affected by a persistent cross-site scripting issue. Attackers can embed malicious payloads within markdown files. Uploading specially crafted markdown files allows execution of arbitrary JavaScript when the files are opened, potentially leading to remote code execution.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-47838

Affected Products

Markright

References · 7

• 🔥 https://vulncheck.com/advisories/markright-persistent-cross-site-scripting · Exploit
• 🔥 https://exploit-db.com/exploits/49834 · Exploit
• 🔥 https://imgur.com/a/VOsgKbZ · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-47838 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47838 · Vendor Advisory
• https://github.com/dvcrn/markright · Note
• https://twitter.com/CVEnew/status/2012303206748143874 · Twitter Post