CVE-2023-35885
Mgt-Commerce Cloudpanel 2.0.0 – 2.3.1
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-35885 is a critical-severity Reliance on Cookies without Validation and Integrity Checking (CWE-565) vulnerability in Mgt-Commerce Cloudpanel. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Data Obfuscation (T1001); ranked in the top 0.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CloudPanel 2 versions prior to 2.3.1 contain an insecure file-manager cookie authentication mechanism tracked as CVE-2023-35885. The flaw is rated 9.8 under CVSS 3.1 and is associated with CWE-565, indicating reliance on cookies without proper validation or integrity checks. The affected component allows unauthenticated network access to file-manager functionality in the CloudPanel control panel.
An attacker with network reachability can supply a crafted cookie to bypass authentication entirely. Successful exploitation grants full read, write, and delete access to files on the server, enabling complete compromise of confidentiality, integrity, and availability without any user interaction or prior credentials.
The vendor changelog for CloudPanel 2.3.1 addresses the issue through corrected cookie handling in the file-manager component. Public references, including a detailed disclosure and accompanying proof-of-concept repository, confirm that updating to the patched release resolves the authentication weakness.
EPSS for the vulnerability stands at 0.9412, indicating sustained exploitation interest following disclosure. Public artifacts such as the FallingSkies proof-of-concept further demonstrate practical attack feasibility against unpatched instances.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-39878
Vulnerability Data
CloudPanel 2 before 2.3.1 has insecure file-manager cookie authentication.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Strong authentication mechanisms reduce reliance on unvalidated cookies for identity and access decisions.
Cookies commonly carry identity assertions; requiring their protection, conveyance, and verification directly eliminates the weakness.
Enforcing access policy and least privilege limits damage from cookie misuse but does not address cookie validation itself.
Integrity protections for data-at-rest can apply to cookie stores but do not cover validation during use.
Cryptographic integrity for data-in-transit directly mitigates tampering of cookies sent over the network.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Application security requirements can mandate cookie validation, integrity protection, and server-side session handling.
Secure coding practices directly eliminate reliance on unvalidated cookies by requiring proper integrity checks and server-side verification.
Security testing can detect cookie-validation flaws but does not itself implement the required controls.
A.8.5 chooses, strengthens and protects the act of authenticating a claimed identity; CWE-565 is a flawed reliance on an unvalidated client-supplied token after identity has already been accepted, so the control never stops that acceptance from being exploited.