CVE-2023-33243

HIGH

STARFACE < 7.3.0.10 - Authentication Bypass via Password Hash

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2023-33243. PoCs published by RedTeam Pentesting GmbH, RedTeamPentesting.

AI-analyzed exploit summary This exploit demonstrates an authentication bypass in STARFACE PBX by leveraging the use of password hashes instead of cleartext passwords. The PoC Python script automates the login process by calculating the required 'secret' value using the SHA512 hash of the password.

Description

RedTeam Pentesting discovered that the web interface of STARFACE as well as its REST API allows authentication using the SHA512 hash of the password instead of the cleartext password. While storing password hashes instead of cleartext passwords in an application's database generally has become best practice to protect users' passwords in case of a database compromise, this is rendered ineffective when allowing to authenticate using the password hash.

Exploits (2)

exploitdb WORKING POC
by RedTeam Pentesting GmbH · textwebappsjsp
https://www.exploit-db.com/exploits/51503

This exploit demonstrates an authentication bypass in STARFACE PBX by leveraging the use of password hashes instead of cleartext passwords. The PoC Python script automates the login process by calculating the required 'secret' value using the SHA512 hash of the password.

Classification
Working Poc 100%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: STARFACE PBX 7.3.0.10 and earlier
No auth needed
Prerequisites: SHA512 hash of the user's password · access to the target STARFACE PBX web interface
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 1 stars
by RedTeamPentesting · poc
https://github.com/RedTeamPentesting/CVE-2023-33243

This PoC demonstrates an authentication bypass vulnerability in STARFACE by allowing login using a password hash instead of the plaintext password. It includes both web and REST API login methods.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: STARFACE (version not specified)
No auth needed
Prerequisites: Valid login ID · SHA512 password hash · Access to the target URL
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v3 8.1
EPSS 0.0442
EPSS Percentile 90.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-916
Status published
Products (1)
starface/starface < 7.3.0.10
Published Jun 15, 2023
Tracked Since Feb 18, 2026