CVE-2023-37265 is a critical-severity (CVSS 9.8) Missing Authentication vulnerability in github.com/IceWhaleTech/CasaOS-Gateway. A fix is available for github.com/IceWhaleTech/CasaOS-Gateway — see the affected versions and patch details below.
Incorrect identification of source IP addresses in CasaOS
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-37265.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
github.com/IceWhaleTech/CasaOS-GatewayReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
CasaOS is an open-source Personal Cloud system. Due to a lack of IP address verification an unauthenticated attackers can execute arbitrary commands as root on CasaOS instances. The problem was addressed by improving the detection of client IP addresses in 391dd7f. 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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/IceWhaleTech/CasaOS-Gateway | all versions | 0.4.4go get github.com/IceWhaleTech/CasaOS-Gateway@v0.4.4 |
Affected Products
casaosicewhalecasaos-gatewayicewhaleDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/IceWhaleTech/CasaOS-Gateway, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/IceWhaleTech/CasaOS-Gateway to 0.4.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-37265 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.
How to detect CVE-2023-37265
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2023-37265 -u https://target- Template
- CasaOS < 0.4.4 - Authentication Bypass via Internal IP
- Severity
- critical
- Impact
- Successful exploitation allows unauthorized access to the CasaOS system.
- Remediation
- The problem was addressed by improving the detection of client IP addresses in 391dd7f. This patch is part of CasaOS 0.4.4.
Template by ProjectDiscovery nuclei-templates (iamnoooob, DhiyaneshDK, pdresearch), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2023-37265 in your dependencies?
Find it across Go, including transitive dependencies.