gotson komga up to 1.21.x EPUB File Parser improper control of interaction frequency

Summaryinfo

A vulnerability identified as problematic has been detected in gotson komga up to 1.21.x. This affects an unknown function of the component EPUB File Parser. The manipulation leads to improper control of interaction frequency. This vulnerability is referenced as CVE-2025-52880. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in gotson komga up to 1.21.x. This issue affects some unknown functionality of the component EPUB File Parser. The manipulation with an unknown input leads to a improper control of interaction frequency vulnerability. Using CWE to declare the problem leads to CWE-799. The product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests. Impacted is integrity. The summary by CVE is:

Komga is a media server for comics, mangas, BDs, magazines and eBooks. A Cross-Site Scripting (XSS) vulnerability has been discovered in versions 1.8.0 through 1.21.3 when serving EPUB resources, either directly from the API, or when reading using the epub reader. The vulnerability lets an attacker perform actions on the victim's behalf. When targeting an admin user, this can be combined with controlling a server-side command to achieve arbitrary code execution. For this vulnerability to be exploited, a malicious EPUB file has to be present in a Komga library, and subsequently accessed in the Epub reader by an admin user. Version 1.22.0 contains a patch for the issue.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-52880 since 06/20/2025. The exploitation is known to be difficult. The attack may be initiated remotely. The exploitation requires an enhanced level of successful authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 1.22.0 eliminates this vulnerability. Applying the patch 5f9cc449b7846ed2066752c72c9ce7b20c3a85a7 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 EUVD (EUVD-2025-19058). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• gotson

Name

• komga

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21

License

• open-source

Website

• Product: https://github.com/gotson/komga/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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