CVE-2026-43984 Details
Description
Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose `log_js_errors` to any authenticated user, including guest users when guest access is enabled. The endpoint writes attacker-controlled strings directly into the main application log. The administrator-only `logFile` view then reads that log file and embeds it into an HTML response without escaping. This creates a stored cross-site scripting condition where a low-privilege guest can inject HTML or JavaScript into the log file and have it execute in an administrator's browser when the log viewer is opened. Version 2.17.1 patches the issue.
A stored cross-site scripting vulnerability has been identified in Tautulli, a monitoring tool for Plex Media Server, in versions prior to 2.17.1. The issue arises because the application exposes 'log_js_errors' to all authenticated users, including guests when guest access is enabled. This endpoint allows the injection of attacker-controlled strings into the main application log. The 'logFile' view, accessible only to administrators, reads this log and embeds it into an HTML response without proper escaping. As a result, a low-privilege guest can inject HTML or JavaScript that executes in an administrator's browser when the log viewer is accessed.
Users can update to Tautulli version 2.17.1, which patches this vulnerability by sanitizing JavaScript log errors to prevent cross-site scripting.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 4, 2026CISA-ADP
Assessed Jun 4, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Tautulli/Tautulli/security/advisories/GHSA-f4j7-pjwc-4jrr | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/Tautulli/Tautulli/releases/tag/v2.17.1 | [email protected] | Release NotesVendor |
| https://github.com/Tautulli/Tautulli/security/advisories/GHSA-f4j7-pjwc-4jrr | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Tautulli | <= 2.17.0 (semver) |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 22, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 4, 2026 | CVE Modified | CISA-ADP |
| Jun 4, 2026 | New CVE Received | [email protected] |