CVE-2021-4164

Name: CVE-2021-4164
Creator: NVD / NIST
Published: 2022-01-17T13:15:08.193+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.54%

Last modified Jun 17, 2026

CVE-2021-4164 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. calibre-web is vulnerable to Cross-Site Request Forgery (CSRF). EPSS estimates a 0.54% chance of exploitation in the next 30 days.

Description

calibre-web is vulnerable to Cross-Site Request Forgery (CSRF)

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.54%

41.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Janeczku	Calibre-Web	< 0.6.15

References

https://github.com/janeczku/calibre-web/commit/785726deee13b4d56f6c3503dd57c1e3eb7d6f30Patch, Third Party Advisory
https://huntr.dev/bounties/2debace1-a0f3-45c1-95fa-9d0512680758Exploit, Third Party Advisory
https://github.com/janeczku/calibre-web/commit/785726deee13b4d56f6c3503dd57c1e3eb7d6f30Patch, Third Party Advisory
https://huntr.dev/bounties/2debace1-a0f3-45c1-95fa-9d0512680758Exploit, Third Party Advisory

Timeline

Published: Jan 17, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4164?

calibre-web is vulnerable to Cross-Site Request Forgery (CSRF)

How severe is CVE-2021-4164?

CVE-2021-4164 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4164?

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-2021-4164?

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

Scan your code now

Source: NVD / NIST