Auth bypass in 201206030 Novel-Plus
CVE-2026-90939
novel-plus through 5.3.3 contains an information disclosure vulnerability in the /sys/user/list endpoint that lacks proper permission annotations. Authenticated attackers can retrieve password hashes and personal data including email addresses and phone numbers for users within their data scope, enabling offline hash cracking and account takeover.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/201206030/novel-plus (product)
- github.com/201206030/novel-plus/blob/d63c3ee394657046ebd469e263532a350a60e930/n… (technical-description)
- github.com/201206030/novel-plus/blob/d63c3ee394657046ebd469e263532a350a60e930/n… (technical-description)
- github.com/201206030/novel-plus/releases/tag/v5.3.3 (release-notes)
- github.com/LinYuanyi1/cve-request-poc/blob/master/novel-plus/poc-03-user-list-p… (exploit)
- www.vulncheck.com/advisories/novel-plus-through-5.3.3-missing-authorization-on-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-90939?
- CVE-2026-90939 is a medium-severity vulnerability in 201206030 Novel-Plus, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-09-14.
- How severe is CVE-2026-90939?
- Medium severity. CVSS v3 base score is 6.5 out of 10.