PT-2021-23021 · Unknown · Tiny File Manager

Published 2021-09-15 · Updated 2025-12-31 · CVE-2021-40966

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions TinyFileManager versions up to and including 2.4.6

Description A Stored XSS issue exists in TinyFileManager when the server is given a file that contains HTML and javascript in its name. A malicious user can upload a file with a malicious filename containing javascript code, which will run on any user's browser when they access the server. This occurs in the /tinyfilemanager.php endpoint.

Recommendations For versions up to and including 2.4.6, consider disabling the file upload feature in /tinyfilemanager.php until a patch is available to prevent exploitation of the Stored XSS issue. Restrict access to the /tinyfilemanager.php endpoint to minimize the risk of malicious file uploads. Avoid using filenames that contain HTML or javascript code in the affected TinyFileManager versions.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-40966

Affected Products

Tiny File Manager

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2021-40966 · Security Note
• https://osv.dev/vulnerability/CVE-2021-40966 · Vendor Advisory
• https://github.com/prasathmani/tinyfilemanager · Note
• https://t.me/cibsecurity/28953 · Telegram Post
• https://t.me/cvenotify/21522 · Telegram Post
• https://t.me/cvenotify/20936 · Telegram Post
• https://t.me/cveNotify/147390 · Telegram Post
• https://gist.github.com/omriinbar/953368dcdd9e5eeefd83920166099528 · Note