What is CVE-2021-41567?

CVE-2021-41567 is a medium-severity vulnerability in Tad Uploader, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-10-08.

How severe is CVE-2021-41567?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Tad Uploader

CVE-2021-41567

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-10-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Tad Uploader — versions 0
Tad Uploader Project

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.twcert.org.tw/tw/cp-132-5171-64439-1.html (Third Party Advisory)

Frequently asked questions

What is CVE-2021-41567?: CVE-2021-41567 is a medium-severity vulnerability in Tad Uploader, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-10-08.
How severe is CVE-2021-41567?: Medium severity. CVSS v3 base score is 6.1 out of 10.