kovidgoyal calibre up to 8.13.x file inclusion

Summaryinfo

A vulnerability described as critical has been identified in kovidgoyal calibre up to 8.13.x. The impacted element is an unknown function. The manipulation results in file inclusion. This vulnerability is reported as CVE-2025-64486. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in kovidgoyal calibre up to 8.13.x. It has been classified as critical. Affected is an unknown code block. The manipulation with an unknown input leads to a file inclusion vulnerability. CWE is classifying the issue as CWE-73. The product allows user input to control or influence paths or file names that are used in filesystem operations. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

calibre is an e-book manager. In versions 8.13.0 and prior, calibre does not validate filenames when handling binary assets in FB2 files, allowing an attacker to write arbitrary files on the filesystem when viewing or converting a malicious FictionBook file. This can be leveraged to achieve arbitrary code execution. This issue is fixed in version 8.14.0.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-64486 since 11/05/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 274556 (Linux Distros Unpatched Vulnerability : CVE-2025-64486), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.14.0 eliminates this vulnerability. Applying the patch 6f94bce214bf7d43c829804db3741afa5e83c0c5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (274556) and EUVD (EUVD-2025-38333). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• kovidgoyal

Name

• calibre

Version

• 8.0
• 8.1
• 8.2
• 8.3
• 8.4
• 8.5
• 8.6
• 8.7
• 8.8
• 8.9
• 8.10
• 8.11
• 8.12
• 8.13

License

• open-source

Website

• Product: https://github.com/kovidgoyal/calibre/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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