CVE-2023-37266

Name: CVE-2023-37266
Creator: NVD / NIST
Published: 2023-07-17T21:15:09.733+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 5.87%

Last modified Jun 17, 2026

CVE-2023-37266 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 5.87% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

5.87%

92.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Icewhale	Casaos	< 0.4.4

References

https://github.com/IceWhaleTech/CasaOS/commit/705bf1facbffd2ca40b159b0303132b6fdf657adPatch
https://github.com/IceWhaleTech/CasaOS/security/advisories/GHSA-m5q5-8mfw-p2hrPatch, Third Party Advisory
https://www.sonarsource.com/blog/security-vulnerabilities-in-casaosExploit, Third Party Advisory
https://github.com/IceWhaleTech/CasaOS/commit/705bf1facbffd2ca40b159b0303132b6fdf657adPatch
https://github.com/IceWhaleTech/CasaOS/security/advisories/GHSA-m5q5-8mfw-p2hrPatch, Third Party Advisory

Timeline

Published: Jul 17, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-37266?

How severe is CVE-2023-37266?

CVE-2023-37266 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 5.87% probability of exploitation in the next 30 days.

How do I fix CVE-2023-37266?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-37266?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST