PT-2021-21270 · Showdoc · Showdoc

Pd1R · Published 2021-09-08 · Updated 2021-09-15 · CVE-2021-36440

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions ShowDoc version 2.9.5

Description The issue allows remote attackers to execute arbitrary code via the file url parameter in the AdminUpdateController.class.php component. This enables attackers to upload files without restrictions, potentially leading to code execution.

Recommendations For ShowDoc version 2.9.5, consider restricting access to the file url parameter in the AdminUpdateController.class.php component to minimize the risk of exploitation. As a temporary workaround, avoid using the file url parameter until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2021-36440

GHSA-C442-3278-RHRG

Affected Products

Showdoc

References · 7

• 🔥 https://github.com/star7th/showdoc/issues/1406 · Exploit
• https://osv.dev/vulnerability/CVE-2021-36440 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-36440 · Security Note
• https://osv.dev/vulnerability/GHSA-c442-3278-rhrg · Vendor Advisory
• https://github.com/star7th/showdoc · Note
• https://github.com/star7th/showdoc/commit/49b992d4c548c8c615a92b6efe8a50c8f1083abf · Note
• https://t.me/cibsecurity/28536 · Telegram Post