Tad Book3 - Improper Authorization

published 2021-10-08 5y ago modified 2026-06-17 4mo ago also EUVD-2021-28964

cvss: 9.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 69%
public exploits: 0; none known

Tad Book3 editing book page does not perform identity verification. Remote attackers can use the vulnerability to view and modify arbitrary content of books without permission.

Patch / fix

fixed in 1

tad_book3_project tad_book3 3.9

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Exploit prediction

1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD	2.0	6.4	AV:N/AC:L/Au:N/C:P/I:P/A:N

Affected products

Tad Tad Book3

Classification

Weakness

CWE-285 Improper Authorization
CWE-306 Missing Authentication for Critical Functionality

References

twcert.org.tw /tw/cp-132-5173-e21ba-1.html
third-party-advisory

Sources

CVE List CVE-2021-41974
NVD CVE-2021-41974

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