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VulnerabilityPublished

CVE-2025-66562: AI-QL tuui · Cross-site Scripting

Affects AI-QL tuuiSource CVE Database V5

0

Not known to be exploited · CVSS 8.9 High : upgrade to 1.3.4 soon.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score
8.9High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.3.4
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade ai-ql/tuui to 1.3.4.

Affected software

ProductAffectedFixed in
GitHubai-ql/tuuipkg:github/ai-ql/tuuiOther threatsAffected
  • <1.3.4
Fixed in
  • 1.3.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

  1. Immediate upgrade of all Tuui clients to version 1.3.4 or later to apply the official patch fixing the vulnerability.
  2. Implement strict content filtering and sanitization on all inbound Markdown messages to prevent malicious JavaScript injection, especially in environments where patching may be delayed.
  3. Restrict or disable the IPC interface used for spawning processes if feasible, or apply strict access controls to limit its exposure.
  4. Educate users about the risks of opening untrusted Markdown messages and implement email and messaging gateway protections to detect and block malicious content.
  5. Employ endpoint detection and response (EDR) solutions to monitor for unusual process spawning or command execution originating from Tuui processes.
  6. Conduct regular vulnerability scanning and penetration testing focusing on client-side applications like Tuui to identify similar issues proactively.
  7. Maintain an incident response plan that includes procedures for containment and remediation of client-side remote code execution incidents.
  8. Network segmentation to limit the lateral movement potential if a client is compromised. These measures, combined with patching, will significantly reduce the risk posed by this vulnerability.

Description

CVE-2025-66562 is a high-severity vulnerability in AI-QL's Tuui desktop client versions prior to 1.3.4. It stems from an improper neutralization of input during web page generation, specifically a Cross-Site Scripting (XSS) flaw in the Markdown rendering component that allows execution of arbitrary JavaScript within ECharts code blocks. This XSS can be leveraged remotely to execute system commands via an exposed IPC interface that spawns processes, effectively enabling remote code execution when a victim views a malicious Markdown message. The vulnerability requires user interaction (viewing the malicious content) and has a high attack complexity. No known exploits are currently in the wild, and the issue is fixed in version 1.3.4. European organizations using Tuui should urgently update to mitigate risk, as the vulnerability could lead to full system compromise.

References

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