CVE-2023-48789
Fortinet Fortiportal 6.0.0 – 6.0.15
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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-2023-48789 is a medium-severity Client-Side Enforcement of Server-Side Security (CWE-602) vulnerability in Fortinet Fortiportal. Its CVSS base score is 4.3 (Medium).
Operationally, ranked at the 40th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to AC-25 (Reference Monitor) and AC-3 (Access Enforcement) — see the control section below for these in your framework.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-52822
Vulnerability Data
A client-side enforcement of server-side security in Fortinet FortiPortal version 6.0.0 through 6.0.14 allows attacker to improper access control via crafted HTTP requests.
- CWE(s)
Related Threats
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires a tamper-proof, always-invoked reference monitor that cannot be bypassed by client-side logic.
Enforces all access decisions on the server according to policy rather than trusting client-supplied enforcement.
Enforces information-flow rules at the server boundary instead of delegating them to the client.
Monitors and controls all external and key internal interfaces so that server-side policy cannot be off-loaded to clients.
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.
Secure development lifecycle mandates server-side validation and prevents reliance on client enforcement.
Application security requirements explicitly call for server-side enforcement of security mechanisms.
Secure architecture principles discourage client-side trust but do not directly address this weakness.
Secure coding standards require server-side checks and reject client-only enforcement.
Security testing can detect client-side enforcement but is not the primary mitigation.
Information access restriction is undermined when the client is trusted to enforce it.
Hardening callouts derived
DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.
- No fine-grained STIG row for CWE-602, a class-level weakness, and none of its children carries one either.