webcomics dosage up to 3.1 path traversal

Summaryinfo

A vulnerability described as critical has been identified in webcomics dosage up to 3.1. This affects an unknown part. The manipulation results in path traversal. This vulnerability is identified as CVE-2025-64184. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in webcomics dosage up to 3.1. It has been classified as critical. Affected is an unknown code block. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Dosage is a comic strip downloader and archiver. When downloading comic images in versions 3.1 and below, Dosage constructs target file names from different aspects of the remote comic (page URL, image URL, page content, etc.). While the basename is properly stripped of directory-traversing characters, the file extension is taken from the HTTP Content-Type header. This allows a remote attacker (or a Man-in-the-Middle, if the comic is served over HTTP) to write arbitrary files outside the target directory (if additional conditions are met). This issue is fixed in version 3.2.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-64184 since 10/28/2025. 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. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

The vulnerability scanner Nessus provides a plugin with the ID 274575 (Linux Distros Unpatched Vulnerability : CVE-2025-64184), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.2 eliminates this vulnerability. Applying the patch 336a9684191604bc49eed7296b74bd582151181e 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 vulnerability database at Tenable (274575). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• webcomics

Name

• dosage

Version

• 3.0
• 3.1

License

• open-source

Website

• Product: https://github.com/webcomics/dosage/

CPE 2.3info

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CPE 2.2info

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• 🔒

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Once again VulDB remains the best source for vulnerability data.

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