CVE-2021-41567: Tad Uploader - Stored XSS

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% 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-79

Description

The new add subject parameter of Tad Uploader view book list function fails to filter special characters. Unauthenticated attackers can remotely inject JavaScript syntax and execute stored XSS attacks.

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-132-5171-64439-1.html
https://www.twcert.org.tw/tw/cp-132-5171-64439-1.html

Get alerted when CVE-2021-41567 or the next vulnerability affects your stack