Kovah LinkAce up to 2.1.8 Link cross site scripting

Summaryinfo

A vulnerability has been found in Kovah LinkAce up to 2.1.8 and classified as problematic. The affected element is an unknown function of the component Link Handler. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2025-53838. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Kovah LinkAce up to 2.1.8. This affects an unknown part of the component Link Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

LinkAce is a self-hosted archive to collect website links. A stored cross-site scripting (XSS) vulnerability was discovered in versions prior to 2.1.9 that allows an attacker to inject arbitrary JavaScript, which is then executed in the context of a user's browser when the malicious link is clicked. This is a one-click XSS, meaning the victim only needs to click a crafted link — no further interaction is required. The application contains a stored XSS vulnerability due to insufficient filtering and escaping of user-supplied data inserted into link attributes. Malicious JavaScript code can be saved in the database along with the link and executed in the user’s browser when clicking the link, leading to arbitrary script execution within the context of the site. Version 2.1.9 fixes the issue.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-53838 since 07/09/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.1.9 eliminates this vulnerability. Applying the patch 4da467a4b0fbb1650670e603f4449b8a47695631 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-2025-27171). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Kovah

Name

• LinkAce

Version

• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8

License

• open-source

Website

• Product: https://github.com/Kovah/LinkAce/

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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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