CVE-2023-5035
Moxa Eds-G503 Firmware ≤ 5.2
Raw vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:NCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-5035 is a low-severity Sensitive Cookie in HTTPS Session Without 'Secure' Attribute (CWE-614) vulnerability in Moxa Eds-G503 Firmware. Its CVSS base score is 3.1 (Low).
Operationally, exploitation aligns with the MITRE ATT&CK technique Network Sniffing (T1040); ranked at the 11th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-57381
Vulnerability Data
A vulnerability has been identified in PT-G503 Series firmware versions prior to v5.2, where the Secure attribute for sensitive cookies in HTTPS sessions is not set, which could cause the cookie to be transmitted in plaintext over an HTTP session.…
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The vulnerability may lead to security risks, potentially exposing user session data to unauthorized access and manipulation.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V3.3.1
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Eliminates cleartext exposure of session identifiers or tokens that would allow hijacking.
The control explicitly requires confidentiality protection for transmitted information, preventing cleartext exposure of sensitive data.
Role-based training covers secure transmission methods, mitigating cleartext transmission of sensitive data.
By requiring documented security controls for information exchanges, the control reduces the risk of cleartext transmission of sensitive data.
Mapping transmission actions in data flows helps prevent cleartext transmission of sensitive information.
Settings can enforce secure transmission protocols to prevent cleartext transmission of sensitive data.
Policy addresses secure transport and handling of media to avoid cleartext transmission of sensitive information.
Enforces safeguards against cleartext transmission of CUI when data leaves organizational boundaries to external systems.
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.
Setting the Secure attribute is a direct mechanism for protecting sensitive session data in transit over HTTPS.
Enforcing hardened configuration baselines includes requiring the Secure flag on sensitive cookies.
Secure SDLC practices explicitly require correct use of security attributes such as the cookie Secure flag.
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.
Mandating cryptographic protection and stronger authentication on public networks stops the transmission of plaintext sensitive information.