How severe is CVE-2023-37266?

CVE-2023-37266 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-37266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-37266?

CVE-2023-37266 affects Icewhale Casaos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-37266?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-37266 published?

CVE-2023-37266 was published on 2023-07-17 and last updated on 2026-06-17.

CVE-2023-37266

CVE-2023-37266 is a critical-severity vulnerability in Icewhale Casaos with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Icewhale Casaos
Published: 2023-07-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-37266?: 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.
How severe is CVE-2023-37266?: CVE-2023-37266 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-37266 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-37266?: CVE-2023-37266 affects Icewhale Casaos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-37266?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-37266 published?: CVE-2023-37266 was published on 2023-07-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:icewhale:casaos:*:*:*:*:*:*:*:*

More vulnerabilities in Icewhale Casaos

CVE-2023-37265 — Critical (CVSS 9.8): CasaOS is an open-source Personal Cloud system. Due to a lack of IP address verification an unauthenticated attackers…
CVE-2022-24193 — Critical (CVSS 9.8): CasaOS before v0.2.7 was discovered to contain a command injection vulnerability.
CVE-2024-24767 — Critical (CVSS 9.1): CasaOS-UserService provides user management functionalities to CasaOS. Starting in version 0.4.4.3 and prior to version…
CVE-2023-37469 — High (CVSS 8.8): CasaOS is an open-source personal cloud system. Prior to version 0.4.4, if an authenticated user using CasaOS is able…
CVE-2024-24765 — High (CVSS 7.5): CasaOS-UserService provides user management functionalities to CasaOS. Prior to version 0.4.7, path filtering of the…
CVE-2025-34171 — Medium (CVSS 5.3): CasaOS versions up to and including 0.4.15 expose multiple unauthenticated endpoints that allow remote attackers to…

All CVEs affecting Icewhale Casaos →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →