What’s Vulnerable › Vulnerabilities

CVE-2021-40966

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-15 · updated 2026-06-17
• Weakness: CWE-79

Description

A Stored XSS exists in TinyFileManager All version up to and including 2.4.6 in /tinyfilemanager.php 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 and it will run on any user browser when they access the server.

Affected products

• prasathmani TinyFileManager: through 2.4.6

References

• https://gist.github.com/omriinbar/953368dcdd9e5eeefd83920166099528
• https://github.com/prasathmani/tinyfilemanager
• https://gist.github.com/omriinbar/953368dcdd9e5eeefd83920166099528
• https://github.com/prasathmani/tinyfilemanager

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