What is CVE-2025-63872?

CVE-2025-63872 is a medium-severity vulnerability in Deepseek, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-12-02.

How severe is CVE-2025-63872?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Deepseek

CVE-2025-63872

DeepSeek V3.2 has a Cross Site Scripting (XSS) vulnerability, which allows JavaScript execution through model-generated SVG content.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-12-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (15.6th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Deepseek — versions 3.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

medium.com/@vinitkundu14/cve-2025-63872-svg-based-xss-in-deepseek-chat-v3-2-db4… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-63872?: CVE-2025-63872 is a medium-severity vulnerability in Deepseek, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-12-02.
How severe is CVE-2025-63872?: Medium severity. CVSS v3 base score is 6.1 out of 10.