CVE-2023-37266
CRITICAL NUCLEICasaOS < 0.4.4 - Unauthenticated Remote Code Execution via JWT Validation Bypass
Title source: llmExploitation Summary
CVE-2023-37266 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.
Description
CasaOS is an open-source Personal Cloud system. Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as `root` on CasaOS instances. This problem was addressed by improving the validation of JWTs in commit `705bf1f`. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.
Nuclei Templates (1)
CasaOS < 0.4.4 - Authentication Bypass via Random JWT Token
CRITICALVERIFIEDby iamnoooob,DhiyaneshDK,pdresearch
Shodan:
http.html:"/CasaOS-UI/public/index.html" || http.html:"/casaos-ui/public/index.html"
FOFA:
body="/CasaOS-UI/public/index.html" || body="/casaos-ui/public/index.html"
References (3)
Core 3
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/IceWhaleTech/CasaOS/security/advisories/GHSA-m5q5-8mfw-p2hr
Patch x_refsource_misc
https://github.com/IceWhaleTech/CasaOS/commit/705bf1facbffd2ca40b159b0303132b6fdf657ad
Exploit, Third Party Advisory x_refsource_misc
https://www.sonarsource.com/blog/security-vulnerabilities-in-casaos
Scores
CVSS v3
9.8
EPSS
0.0587
EPSS Percentile
92.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
total
Details
CWE
CWE-287
Status
published
Products (2)
icewhale/casaos
< 0.4.4
IceWhaleTech/CasaOS
0 - 0.4.4Go
Published
Jul 17, 2023
Tracked Since
Feb 18, 2026