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
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2023-37265 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 376,715 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
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 |
Detection & 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
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2023-37265 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2023-37265. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
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?
O3 Security finds CVE-2023-37265 across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.