Arbitrary file upload in Z-Blogphp
CVE-2026-6650
A vulnerability was identified in Z-BlogPHP 1.7.5. This affects the function App::UnPack of the file /zb_users/plugin/AppCentre/app_upload.php of the component ZBA File Handler. The manipulation leads to unrestricted upload. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (29.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Z-Blogphp — versions 1.7.5
Weakness classification (CWE)
References
- vuldb.com/vuln/358284 (technical-description, vdb-entry)
- vuldb.com/vuln/358284/cti (signature, permissions-required)
- vuldb.com/submit/793451 (third-party-advisory)
- github.com/qingyun985/Cyber-Security/issues/3 (issue-tracking, exploit)
Frequently asked questions
- What is CVE-2026-6650?
- CVE-2026-6650 is a medium-severity vulnerability in Z-Blogphp, classified under Improper Access Control. CVSS score: 4.7/10. Published 2026-04-20.
- How severe is CVE-2026-6650?
- Medium severity. CVSS v3 base score is 4.7 out of 10.