CVE-2023-25403

7.5 highEPSS 0.7%

High (7.5) in yf-exam project yf-exam. EPSS 0.7% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-31)
CWE: CWE-639
Published: 2023-03-03
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

yf-exam_project:yf-exam

References

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

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