CVE-2021-47839
HIGHCVSS v3.1: 7.2 · EPSS: 0.0041 (32.7 percentile)
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 7.2 v3.1 · NVD
- EPSS
- 0.0041 (32.7 percentile) · FIRST.org
- CISA KEV
- No
- Type
- XSS · NVD CWE
- Attack conditions (CVSS vector)
- NetworkNo privilegesNo user interaction · Source: NVD Vector
- Published
- 2026-01-16 · Modified: 2026-06-30
- References
- Jump to references (7)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
Description
Marky 0.0.1 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.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Reference https://github.com/vesparny/marky
- Reference https://imgur.com/a/qclfrUx
- Exploit / PoC https://www.exploit-db.com/exploits/49831
- Vendor advisory https://www.vulncheck.com/advisories/marky-persistent-cross-site-scripting
- Distro https://access.redhat.com/security/cve/CVE-2021-47839
- Distro https://bugzilla.redhat.com/show_bug.cgi?id=2430451
- Distro https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47839.json