CVE-2026-43984
highpriority · track · 0EPSS 0.002 · 11 %ileEUEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (1)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
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references (7)
External citations — patches, advisories, analysis.
- https://github.com/Tautulli/Tautulli/releases/Patchcnnvd
- https://github.com/Tautulli/Tautulli/releases/tag/v2.17.1cnnvd
- https://github.com/Tautulli/Tautulli/security/advisories/GHSA-f4j7-pjwc-4jrrcnnvd
- https://github.com/Tautulli/Tautulli/releases/tag/v2.17.1enisa_euvd
- https://github.com/Tautulli/Tautulli/security/advisories/GHSA-f4j7-pjwc-4jrrenisa_euvd
- https://github.com/Tautulli/Tautulli/releases/tag/v2.17.1nvd
- https://github.com/Tautulli/Tautulli/security/advisories/GHSA-f4j7-pjwc-4jrrnvd
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