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CVE-2021-3986

4.3 · MEDIUM

A vulnerability in janeczku/calibre-web allows unauthorized users to view the names of private shelves belonging to other users.

Published Nov 15, 2024CWE-209EPSS 0.37%

Overview

CVE-2021-3986 is a medium-severity vulnerability. It was published on November 15, 2024 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

A vulnerability in janeczku/calibre-web allows unauthorized users to view the names of private shelves belonging to other users. This issue occurs in the file shelf.py at line 221, where the name of the shelf is exposed in an error message when a user attempts to remove a book from a shelf they do not own. This vulnerability discloses private information and affects all versions prior to the fix.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/janeczku/calibre-web/commit/6f5390ead5df9779ac81fadefffb476e03f93548Refhuntr.com/bounties/394af194-61a7-4e33-b373-877d4c766fca

How CyberStrike helps

Frequently asked questions

What is CVE-2021-3986?

CVE-2021-3986 is a medium-severity vulnerability. It was published on November 15, 2024 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2021-3986?

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-3986?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-3986?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-3986 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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