Tautulli up to 2.17.1 Newsletter Configuration newsletter_config.html cross site scripting

Summaryinfo

A vulnerability was found in Tautulli up to 2.17.1. It has been classified as problematic. Affected is an unknown function of the file data/interfaces/default/newsletter_config.html of the component Newsletter Configuration. Performing a manipulation results in cross site scripting. This vulnerability is identified as CVE-2026-49995. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Tautulli up to 2.17.1. This affects an unknown code block of the file data/interfaces/default/newsletter_config.html of the component Newsletter Configuration. 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:

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to 2.17.2, the newsletter cron field stored in the newsletters table is inserted by data/interfaces/default/newsletter_config.html into a JavaScript string without safe JSON encoding. An administrator or caller with the Tautulli API key can store a crafted cron value, and an administrator who later opens the newsletter configuration modal passively triggers script execution in the Tautulli web context. The stored value persists in the database and can continue to execute after credential rotation until it is removed. This issue is fixed in version 2.17.2.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-49995 since 06/02/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation needs additional levels of successful authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

By approaching the search of inurl:data/interfaces/default/newsletter_config.html it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.17.2 eliminates this vulnerability.

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Productinfo

Name

• Tautulli

Version

• 2.17.0
• 2.17.1

Website

• Product: https://github.com/Tautulli/Tautulli/

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