Arbitrary file upload in Eyoucms
CVE-2026-1107
A weakness has been identified in EyouCMS up to 1.7.1/5.0. Impacted is the function check_userinfo of the file Diyajax.php of the component Member Avatar Handler. Executing a manipulation of the argument viewfile can lead to unrestricted upload. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. 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 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: 0.005 (42.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.6% 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
- Eyoucms — versions 1.7.0, 1.7.1, 5.0
- Eyoucms — versions 1.7.0, 1.7.1, 5.0
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)
- github.com/24-2021/vul3/blob/main/Eyoucms/Eyoucms=1.7.1 check_userinfo api view… (broken-link, Broken Link)
- github.com/24-2021/vul3/blob/main/Eyoucms/Eyoucms=1.7.1 check_userinfo api view… (exploit, broken-link, Broken Link)
Frequently asked questions
- What is CVE-2026-1107?
- CVE-2026-1107 is a medium-severity vulnerability in Eyoucms, classified under Improper Access Control. CVSS score: 6.3/10. Published 2026-01-18.
- How severe is CVE-2026-1107?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2026-1107 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.