Tad Book3 - Stored XSS

published 2021-10-08 5y ago modified 2026-06-17 4mo ago also EUVD-2021-28579

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits: 0; none known

Tad Book3 editing book function does not filter special characters. Unauthenticated attackers can remotely inject JavaScript syntax and execute stored XSS attacks.

Patch / fix

fixed in 1

tad_book3_project tad_book3 3.9

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Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

Tad Tad Book3

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

twcert.org.tw /tw/cp-132-5167-2defb-1.html
third-party-advisory

Sources

CVE List CVE-2021-41563
NVD CVE-2021-41563

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