CVEvulnerability
CVE-2021-47839
5.1 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-01-16
- Last modified
- 2026-07-15
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 5.1 MEDIUM — 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
- CVSS 3.1 ([email protected])
- 7.2 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79
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.
Related
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://github.com/vesparny/marky github.com
- https://imgur.com/a/qclfrUx imgur.com
- https://www.exploit-db.com/exploits/49831 www.exploit-db.com
- https://www.vulncheck.com/advisories/marky-persistent-cross-site-scripting www.vulncheck.com
- https://access.redhat.com/security/cve/CVE-2021-47839 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2430451 bugzilla.redhat.com
- https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47839.json security.access.redhat.com
- https://www.vulncheck.com/advisories/marky-persistent-cross-site-scripting www.vulncheck.com