Auth bypass in Yf-Exam Project
CVE-2023-25403
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (49.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Yf-Exam Project — versions 1.8.0
Weakness classification (CWE)
References
- github.com/CleverStupidDog/yf-exam/issues/2 (Exploit, Third Party Advisory, Issue Tracking)
- github.com/Fw-fW-fw/UPDATE-CVE/blob/main/CVE-2023-25403 (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-25403?
- CVE-2023-25403 is a high-severity vulnerability in Yf-Exam Project, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.5/10. Published 2023-03-03.
- How severe is CVE-2023-25403?
- High severity. CVSS v3 base score is 7.5 out of 10.