What is CVE-2025-66222?

CVE-2025-66222 is a critical-severity vulnerability in Thinkinai Deepchat, classified under Code Injection. CVSS score: 9.6/10. Published 2025-12-03.

How severe is CVE-2025-66222?

Critical severity. CVSS v3 base score is 9.6 out of 10.

RCE in Thinkinai Deepchat

CVE-2025-66222

DeepChat is a smart assistant uses artificial intelligence. In 0.5.0 and earlier, there is a Stored Cross-Site Scripting (XSS) vulnerability in the Mermaid diagram renderer allows an attacker to execute arbitrary JavaScript within the appl…

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.005 (40.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Thinkinai Deepchat
Thinkinaixyz Deepchat — versions < 0.5.0

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2025-66222?: CVE-2025-66222 is a critical-severity vulnerability in Thinkinai Deepchat, classified under Code Injection. CVSS score: 9.6/10. Published 2025-12-03.
How severe is CVE-2025-66222?: Critical severity. CVSS v3 base score is 9.6 out of 10.