TI-2021-14768 Aliases CVE-2021-36440 GHSA-c442-3278-rhrg

Unrestricted File Upload in ShowDoc v2.9.5 allows remote attackers to execute arbitrary…

MEDIUM 50CWE-434Published 2021-09-08 · 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: Fixed

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

Summary

Unrestricted File Upload in ShowDoc v2.9.5 allows remote attackers to execute arbitrary code via the 'file_url' parameter in the component AdminUpdateController.class.php'.

Why it matters now

EPSS 0.04762 91st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed showdoc/showdoc (Packagist): 2.9.6

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
—	showdoc/showdoc (Packagist)	before 2.9.6	2.9.6	Patch available	GHSA-c442-3278-rhrg

— Vendor— Affected all versions Fixed in — No fix listed CNA
showdoc/showdoc (Packagist) Vendor— Affected before 2.9.6 Fixed in 2.9.6 Patch available GHSA-c442-3278-rhrg

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:showdoc:showdoc:2.9.5:::::::*	2.9.5	Vulnerable	star7th

cpe:2.3:a:showdoc:showdoc:2.9.5:*:*:*:*:*:*:* Versions 2.9.5 Vulnerable ·star7th

Remediation

Fix · GHSA-c442-3278-rhrg showdoc/showdoc (Packagist) Fixed in 2.9.6 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2021-36440
2026-10-03 Alias added: GHSA-c442-3278-rhrg

References

Exploit 1

https://github.com/star7th/showdoc/issues/1406

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2021-36440

Other 2

TI-2022-00287 SQL Injection in star7th/showdoc CVSS 3.1CRITICAL 9.8
TI-2021-18398 ShowDoc 2.8.3 ihas a file upload vulnerability, where attackers can use the vulnerability to obtain server permissions. CVSS 3.1CRITICAL 9.8
TI-2021-03036 Cross-Site Request Forgery (CSRF) in star7th/showdoc CVSS 3.1HIGH 8.8
TI-2021-02908 Cross-Site Request Forgery (CSRF) in star7th/showdoc CVSS 3.1HIGH 8.8
TI-2022-00334 Unrestricted Upload of File with Dangerous Type in star7th/showdoc CVSS 3.1HIGH 7.8
TI-2022-00931 There is a Unrestricted Upload of File vulnerability in ShowDoc v2.10.3 in star7th/showdoc CVSS 3.1HIGH 7.2

See all 40 →

Sources

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