CVE-2025-26210

HIGH EPSS 41.3%
Published Sep 3, 202510mo ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
High
Find Similar
Published Sep 3, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago

Description

DeepSeek R1 through V3.1 allows XSS, as demonstrated by JavaScript execution in the context of the run-html-chat.deepseeksvc.com domain. NOTE: some third parties have indicated that this is intended behavior.

CVSS Details

Base Score
8.8
Exploitability
2.8
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
41.3% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 3

VendorProductVersionRange
deepseekdeepseek-r11.0any
deepseekdeepseek-v2*any
deepseekdeepseek-v31.0any

References 3

  • deepseek.com https://deepseek.com
    Permissions Required
  • hackmd.io https://hackmd.io/@MrqrFIlhQFi7vUwkqbrXDw/deepseek
    ExploitThird Party Advisory
  • youtu.be https://youtu.be/IgQwy52FVT4
    Exploit

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.