Vulnerability details

CVE-2026-19677

onPhase Forms

Authentication Bypass Leading to Server-Side Command Execution

CVSS 4.0

9.3Critical

Official description

An authentication bypass vulnerability in the public onPhase/ frevvo registration form version 11.0.14 allows an unauthenticated remote attacker to authenticate as an arbitrary tenant user, obtain TenantAdmin and Designer privileges, and execute arbitrary operating system commands via manipulation of registration parameters containing a valid tenant name and existing user identifier.

CVSS scores

Score	Version	Source	Vector
9.3Critical	4.0	CVEProject cvelistV5 (CNA) (MON-CSIRT)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`

Affected products

Vendor	Product	Versions	Source
onPhase	onPhase Forms	11.0.14	CVEProject cvelistV5 (CNA)

References and advisories

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Details

Published: 2026-10-23
Last updated: 2026-11-05
State: Published
Assigner (CNA): MON-CSIRT

Exploit prediction (EPSS)

0.53%

Probability of exploitation in 30 days

45.2%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-306
Missing authentication for critical function