Auth bypass in Z-Blogphp
CVE-2026-8747
A weakness has been identified in Z-BlogPHP 1.7.4.3430. This affects the function CheckComment of the file zb_system/function/c_system_event.php of the component Commend Approval Handler. This manipulation causes improper authorization. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (25.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.8% 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: 0.003 · change: +0.001
Affected products
- Z-Blogphp — versions 1.7.4.3430
Weakness classification (CWE)
References
- vuldb.com/submit/810027 (third-party-advisory)
- vuldb.com/vuln/364334 (technical-description, vdb-entry)
- vuldb.com/vuln/364334/cti (signature, permissions-required)
- vulnplus-note.wetolink.com/share/31wtzNoJbxKQ (exploit)
Frequently asked questions
- What is CVE-2026-8747?
- CVE-2026-8747 is a medium-severity vulnerability in Z-Blogphp, classified under Incorrect Privilege Assignment. CVSS score: 6.3/10. Published 2026-05-17.
- How severe is CVE-2026-8747?
- Medium severity. CVSS v3 base score is 6.3 out of 10.