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.
References (2)
Core 2
Core References
Exploit, Issue Tracking, Third Party Advisory
https://github.com/CleverStupidDog/yf-exam/issues/2
Third Party Advisory
https://github.com/Fw-fW-fw/UPDATE-CVE/blob/main/CVE-2023-25403
Scores
CVSS v3
7.5
EPSS
0.0021
EPSS Percentile
42.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-639
Status
published
Products (1)
yf-exam_project/yf-exam
1.8.0
Published
Mar 03, 2023
Tracked Since
Feb 18, 2026