VulnerabilityAnalyzed
CVE-2025-26210
DeepSeek R1 through V3.1 allows XSS, as demonstrated by JavaScript execution in the context of the run-html-chat.deepseeksvc.com domain.
HIGH 8.8EPSS 0.58%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.58% probability · 46th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- deepseek/deepseek-r1 · deepseek/deepseek-v2 · deepseek/deepseek-v3
- Source
- cve@mitre.org
References
- https://deepseek.comPermissions Required
- https://hackmd.io/@MrqrFIlhQFi7vUwkqbrXDw/deepseekExploit, Third Party Advisory
- https://youtu.be/IgQwy52FVT4Exploit
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.