Auth bypass in 201206030 Novel-Plus
CVE-2025-6533
A vulnerability, which was classified as critical, has been found in xxyopen/201206030 novel-plus up to 5.1.3. Affected by this issue is the function ajaxLogin of the file novel-admin/src/main/java/com/java2nb/system/controller/LoginController.java of the component CATCHA Handler. The manipulation leads to authentication bypass by capture-replay. The attack may be launched remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.006 (44.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.3% 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: 0.006 · change: +0.001
Affected products
- 201206030 Novel-Plus — versions 5.1.0, 5.1.1, 5.1.2
- Xxyopen Novel-Plus — versions 5.1.0, 5.1.1, 5.1.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- blog.0xd00.com/blog/captcha-replay-attack-lead-to-brute-force-protection-bypass (related, Exploit, Third Party Advisory)
- blog.0xd00.com/blog/captcha-replay-attack-lead-to-brute-force-protection-bypass (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2025-6533?
- CVE-2025-6533 is a medium-severity vulnerability in 201206030 Novel-Plus, classified under Improper Authentication. CVSS score: 5.6/10. Published 2025-06-24.
- How severe is CVE-2025-6533?
- Medium severity. CVSS v3 base score is 5.6 out of 10.
- Is CVE-2025-6533 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.