CVE-2021-41976: Tad Uploader - Improper Authorization

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-10-08 · updated 2026-06-17
Weakness: CWE-285

Description

Tad Uploader edit book list function is vulnerable to authorization bypass, thus remote attackers can use the function to amend the folder names in the book list without logging in.

Affected products

Tad Uploader: before 3.5.4 — fixed in 3.5.4

How to fix

Upgrade to a fixed version: Tad Uploader 3.5.4. Check the vendor advisory for mitigations.

References

https://www.twcert.org.tw/tw/cp-132-5175-a2f8d-1.html
https://www.twcert.org.tw/tw/cp-132-5175-a2f8d-1.html

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