TI-2020-13819 Aliases CVE-2020-20287 GHSA-2fqw-v698-338m

Unrestricted file upload vulnerability in the yccms 3.3 project.

MEDIUM 47CWE-434Published 2021-02-01 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.

Summary

Unrestricted file upload vulnerability in the yccms 3.3 project. The xhUp function's improper judgment of the request parameters, triggers remote code execution.

Why it matters now

EPSS 0.02949 87th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:yccms:yccms:3.3:::::::*	3.3	Vulnerable	Yccms

cpe:2.3:a:yccms:yccms:3.3:*:*:*:*:*:*:* Versions 3.3 Vulnerable ·Yccms

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-20287
2026-10-03 Alias added: GHSA-2fqw-v698-338m

References

Exploit 1

https://blog.jiguang.xyz/posts/remote-code-execution-via-upload-image/

Other 1

http://www.yccms.net/

TI-2020-13820 Sql injection vulnerability in the yccms 3.3 project. CVSS 3.1CRITICAL 9.8
TI-2020-13821 Directory traversal vulnerability in the yccms 3.3 project. CVSS 3.1HIGH 7.5
TI-2025-39515 YCCMS 3.4 contains a stored cross-site scripting (XSS) vulnerability in the article… CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences