CVE-2026-108725
Cheshire Cat AI core through 2.0.23 Stored XSS via uploads plugin
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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 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.
| CWE | CWE-79 |
| Vendor | cheshire-cat-ai |
| Product | core |
| Published | Oct 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
cheshire-cat-ai / core
0 ≤ 2.0.23
References
hackmd.io: https://hackmd.io/@haind03/cheshire-cat-uploads-stored-html-same-origin-xss github.com: https://github.com/cheshire-cat-ai/core/blob/c22731e7009ac89835b1d7b1cabc5989d998ec3e/src/cat/scaffold/plugins/uploads/endpoints.py#L28-L96 github.com: https://github.com/cheshire-cat-ai/core vulncheck.com: https://www.vulncheck.com/advisories/cheshire-cat-ai-core-through-2.0.23-stored-xss-via-uploads-plugin
Credits
HaiND from the Post and Telecommunication Institute of Technology