{"id":"CVE-2026-108725","title":"Cheshire Cat AI core through 2.0.23 contains a stored cross-site scripting vulnerability in the uploads plugin that allows authenticated users to upload HTML files via POST /uploads without type restrictions","summary":"Cheshire Cat AI core through 2.0.23 contains a stored cross-site scripting vulnerability in the uploads plugin that allows authenticated users to upload HTML files via POST /uploads without type restrictions. Attackers can send the publi…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"cheshire-cat-ai","product":"core","affected":["core <= 2.0.23"],"published":"2026-10-11","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:18:44.867","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-108725","references":[{"url":"https://github.com/cheshire-cat-ai/core","label":"disclosure@vulncheck.com"},{"url":"https://github.com/cheshire-cat-ai/core/blob/c22731e7009ac89835b1d7b1cabc5989d998ec3e/src/cat/scaffold/plugins/uploads/endpoints.py#L28-L96","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind03/cheshire-cat-uploads-stored-html-same-origin-xss","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/cheshire-cat-ai-core-through-2.0.23-stored-xss-via-uploads-plugin","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind03/cheshire-cat-uploads-stored-html-same-origin-xss","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00264,"epssPercentile":0.1819,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-13T13:18:05.919586Z"},"ingestedAt":"2026-10-11T13:51:17.029Z","slug":"CVE-2026-108725","body":"## Overview\n\nCheshire Cat AI core through 2.0.23 contains a stored cross-site scripting vulnerability in the uploads plugin that allows authenticated users to upload HTML files via POST /uploads without type restrictions. Attackers can send the public GET /uploads/{path} URL to a signed-in victim, executing script in the application origin with the victim's access_token cookie, including administrators.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":29.7,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":220856,"id":"CVE-2026-108725","ts":1792026869137,"field":"exploit_available","old":"false","new":"true"}]}