Vulnerability Database

309,540

Total vulnerabilities in the database

CVE-2021-36440

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'.

Published: Sep 8, 2021
Updated: Nov 16, 2025
CVE: CVE-2021-36440
GHSA: GHSA-c442-3278-rhrg
Severity: Critical
Exploit:

CVSS v3:

Severity: Critical
Score: 9.8
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

Severity: High
Score: 7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P

CWEs:

CWE-434

Affected Software
References

Software	From	Fixed in
showdoc / showdoc	2.9.5	2.9.5.x
showdoc / showdoc	-	2.9.6

https://github.com/star7th/showdoc/commit/49b992d4c548c8c615a92b6efe8a50c8f1083abf
https://github.com/star7th/showdoc/issues/1406

Deep Security Visibility Without the Complexity

SynScan provides clear, real-time security insights so you can monitor your attack surface, spot risks early, and act fast—without extra complexity.

No setup fees
5-min deployment
Cancel anytime

Book a Demo