How severe is CVE-2021-41974?

CVE-2021-41974 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-41974 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41974?

CVE-2021-41974 affects Tad Book3 Project Tad Book3. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41974?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-41974 published?

CVE-2021-41974 was published on 2021-10-08 and last updated on 2026-06-17.

CVE-2021-41974

CVE-2021-41974 is a critical-severity vulnerability in Tad Book3 Project Tad Book3 with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Tad Book3 Project Tad Book3
Published: 2021-10-08
Last modified: 2026-06-17

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.

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 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-41974 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41974?: CVE-2021-41974 affects Tad Book3 Project Tad Book3. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41974?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-41974 published?: CVE-2021-41974 was published on 2021-10-08 and last updated on 2026-06-17.

References

https://www.twcert.org.tw/tw/cp-132-5173-e21ba-1.html

Affected products (1)

cpe:2.3:a:tad_book3_project:tad_book3:*:*:*:*:*:*:*:*

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