CVE intelligence and bounded remediation
CVE-2021-27855 — Fatpipeinc Ipvpn Firmware security vulnerability
FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p91 and 10.2.2r42 allows a remote, authenticated attacker with read-only privileges to grant themselves administrative privileges. Older versions of FatPipe software may also be vulnerable. The FatPipe advisory identifier for this vulnerability is FPSA001.
- Severity
- High
- CVSS
- 8.8 (3.1)
- Published
- 2021-12-15
- CISA KEV
- Not currently listed
- Ecosystem
- operating-system
- Weaknesses
- CWE-862
Affected products
- fatpipeinc / ipvpn_firmware / 5.2.0
- fatpipeinc / ipvpn_firmware / 6.1.2
- fatpipeinc / ipvpn_firmware / 7.1.2
- fatpipeinc / ipvpn_firmware / 9.1.2
Showing 4 representative product identities from 108 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.
Matched remediation archetype
Authorization bypass, IDOR, and cross-tenant access
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
- Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
- Use synthetic fixtures to compare intended access matrices without accessing another user's real data.
Remediate safely
- Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
- Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
- Add deny-by-default policy tests for horizontal and vertical access across every affected transport.
Authoritative sources
Complete CVE record and remediation plan
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