{"id":"CVE-2025-26210","aliases":["EUVD-2025-26507","GHSA-v669-8m26-4r4w"],"status":"disputed","title":"An Cross-Site Scripting (XSS) vulnerability in DeepSeek R1 through V3.1 allows a remote attacker...","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.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00603,"percentile":0.49298,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2025-09-03T00:00:00Z","modified":"2026-11-07T18:10:00Z","products":[{"vendor":"deepseek","product":"deepseek-r1"},{"vendor":"deepseek","product":"deepseek-v2"},{"vendor":"deepseek","product":"deepseek-v3"}],"references":[{"url":"https://hackmd.io/@MrqrFIlhQFi7vUwkqbrXDw/deepseek","tags":["Exploit","Third Party Advisory"]},{"url":"https://youtu.be/IgQwy52FVT4","tags":["Exploit"]},{"url":"https://deepseek.com","tags":["Permissions Required"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-26210"},{"url":"http://deepseek.com"},{"url":"https://github.com/advisories/GHSA-v669-8m26-4r4w"}],"sources":{"cve":[{"id":"CVE-2025-26210","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.","status":"disputed","published":"2025-09-03T00:00:00Z","modified":"2025-09-08T17:39:51.749Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:27.932735Z"}],"euvd":[{"id":"EUVD-2025-26507","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.","status":"published","published":"2025-09-03T00:00:00Z","modified":"2025-09-08T17:39:51Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:31:46.000077Z"}],"ghsa":[{"id":"GHSA-v669-8m26-4r4w","title":"An Cross-Site Scripting (XSS) vulnerability in DeepSeek R1 through V3.1 allows a remote attacker...","description":"An Cross-Site Scripting (XSS) vulnerability in DeepSeek R1 through V3.1 allows a remote attacker to execute arbitrary code via unspecified input fields.","status":"published","published":"2025-09-03T15:30:33Z","modified":"2025-09-05T21:34:33Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:03:31.03941Z"}],"nvd":[{"id":"CVE-2025-26210","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.","status":"disputed","published":"2025-09-03T14:15:44.43Z","modified":"2026-11-07T18:10:00.2Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-07T20:06:28.095135Z"}]}}