Arbitrary file upload in Eyoucms
CVE-2026-6561
A vulnerability was detected in EyouCMS up to 1.7.1. This issue affects the function edit_adminlogo of the file application/admin/controller/Index.php. Performing a manipulation of the argument filename results in unrestricted upload. The attack is possible to be carried out remotely. The exploit is now public and may 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: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Eyoucms — versions 1.7.0, 1.7.1
Weakness classification (CWE)
References
- vuldb.com/vuln/358198 (technical-description, vdb-entry)
- vuldb.com/vuln/358198/cti (signature, permissions-required)
- vuldb.com/submit/788038 (third-party-advisory)
- github.com/zzk6th/my-cve-notes/blob/main/EyouCMS Arbitrary File Copy Vulnerabil… (exploit)
Frequently asked questions
- What is CVE-2026-6561?
- CVE-2026-6561 is a medium-severity vulnerability in Eyoucms, classified under Improper Access Control. CVSS score: 4.7/10. Published 2026-04-19.
- How severe is CVE-2026-6561?
- Medium severity. CVSS v3 base score is 4.7 out of 10.