CVE-2023-25403 - Vulnerability Details - OpenCVE

Description

CleverStupidDog yf-exam v 1.8.0 is vulnerable to Authentication Bypass. The program uses a fixed JWT key, and the stored key uses username format characters. Any user who logged in within 24 hours. A token can be forged with his username to bypass authentication.

Published: 2023-03-03

Score: 7.5 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:yf-exam_project:yf-exam:1.8.0:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2023-29358	CleverStupidDog yf-exam v 1.8.0 is vulnerable to Authentication Bypass. The program uses a fixed JWT key, and the stored key uses username format characters. Any user who logged in within 24 hours. A token can be forged with his username to bypass authentication.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00206.

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/CleverStupidDog/yf-exam/issues/2
https://github.com/Fw-fW-fw/UPDATE-CVE/blob/main/CVE-2023-25403

History

Fri, 07 Mar 2025 17:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Yf-exam Project Yf-exam

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2023-03-03T00:00:00.000Z

Updated: 2025-03-07T16:39:28.313Z

Reserved: 2023-02-06T00:00:00.000Z

Link: CVE-2023-25403

Vulnrichment

Updated: 2024-08-02T11:18:36.338Z

NVD

Status : Modified

Published: 2023-03-03T23:15:12.140

Modified: 2025-03-07T17:15:17.727

Link: CVE-2023-25403

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-639

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