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CVE-2026-43984— Tautulli has stored XSS in logFile via guest-controlled log_js_errors input

Quick assessment

Affected
Tautulli Tautulli
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tautulli是Tautulli开源的一款用于监控Plex Media Server（媒体服务器）的应用程序。 Tautulli 2.17.1之前版本存在安全漏洞，该漏洞源于暴露log_js_errors端点给任何认证用户，攻击者控制的字符串直接写入主应用日志，管理员查看日志时未转义嵌入HTML响应，导致存储型跨站脚本。

CVSS 8.9 · High EPSS 0.37% · P28

Affected Version Matrix 1

VendorProduct Version RangeStatus
Tautulli Tautulli < 2.17.1 affected
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I. Basic Information for CVE-2026-43984

Vulnerability Information
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Vulnerability Title
Tautulli has stored XSS in logFile via guest-controlled log_js_errors input
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Tautulli 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tautulli是Tautulli开源的一款用于监控Plex Media Server（媒体服务器）的应用程序。 Tautulli 2.17.1之前版本存在安全漏洞，该漏洞源于暴露log_js_errors端点给任何认证用户，攻击者控制的字符串直接写入主应用日志，管理员查看日志时未转义嵌入HTML响应，导致存储型跨站脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Tautulli Tautulli < 2.17.1 -

II. Public POCs for CVE-2026-43984

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 9073 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-43984

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Vendor Advisories for CVE-2026-43984 (1)

Vendor Pages for CVE-2026-43984 (1)

Same Patch Batch · Tautulli · 2026-06-04 · 5 CVEs total

CVE-2026-43986 9.9 CRITICAL Tautulli vulnerable to unauthenticated SSRF in /image/<hash> via attacker-seeded image has
CVE-2026-43985 8.8 HIGH Taultulli has CSRF in /configUpdate via missing anti-CSRF and method restriction that allo
CVE-2026-41065 Tautulli Vulnerable to Unauthenticated/Authenticated Remote Code Execution via Newsletter
CVE-2026-40605 Tautulli Vulnerable to Authenticated Path Traversal in Cache Deletion API

IV. Related Vulnerabilities

Same product: Tautulli
Same vendor: Tautulli
Same weakness: CWE-79

V. Comments for CVE-2026-43984

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