CVE-2025-66698

HIGH

Semantic machines <5.4.8 - Auth Bypass

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-66698. PoCs published by Perunchess.

AI-analyzed exploit summary The repository describes an authentication bypass vulnerability (CVE-2025-66698) in Veda (Semantic Machines) v5.4.8, where an empty ticket parameter is treated as a valid session. The writeup includes curl commands to exploit the vulnerability and enumerate sensitive data.

Description

An issue in Semantic machines v5.4.8 allows attackers to bypass authentication via sending a crafted HTTP request to various API endpoints.

Exploits (1)

nomisec WRITEUP
by Perunchess · poc
https://github.com/Perunchess/CVE-2025-66698

The repository describes an authentication bypass vulnerability (CVE-2025-66698) in Veda (Semantic Machines) v5.4.8, where an empty ticket parameter is treated as a valid session. The writeup includes curl commands to exploit the vulnerability and enumerate sensitive data.

Classification
Writeup 90%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: Veda (Semantic Machines) v5.4.8 (and likely prior versions)
No auth needed
Prerequisites: Access to the target API endpoints
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Not Applicable
http://semantic.com
Broken Link
http://veda.com
Exploit, Third Party Advisory
https://github.com/Perunchess/CVE-2025-66698

Scores

CVSS v3 8.6
EPSS 0.0050
EPSS Percentile 38.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-287
Status published
Products (1)
semantic-machines/veda 5.4.8
Published Jan 13, 2026
Tracked Since Feb 18, 2026