CVE-2021-41974

Name: CVE-2021-41974
Creator: NVD / NIST
Published: 2021-10-08T16:15:08.437+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 1.22%

Last modified Jun 17, 2026

CVE-2021-41974 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

1.22%

64.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tad Book3 Project	Tad Book3	< 3.9

References

https://www.twcert.org.tw/tw/cp-132-5173-e21ba-1.htmlThird Party Advisory
https://www.twcert.org.tw/tw/cp-132-5173-e21ba-1.htmlThird Party Advisory

Timeline

Published: Oct 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41974?

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.

How severe is CVE-2021-41974?

CVE-2021-41974 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41974?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41974?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST