Arbitrary file upload in Maccms Pro
CVE-2026-7578
A weakness has been identified in MacCMS Pro up to 2022.1.3. This vulnerability affects the function install of the file /admi.php/admin/addon/add.html of the component Plugin Installation Handler. Executing a manipulation 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 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: +0.001
Affected products
- Maccms Pro — versions 2022.1.0, 2022.1.1, 2022.1.2
Weakness classification (CWE)
References
- vuldb.com/vuln/360419 (technical-description, vdb-entry)
- vuldb.com/vuln/360419/cti (signature, permissions-required)
- vuldb.com/submit/792283 (third-party-advisory)
- github.com/qingyun985/Cyber-Security/issues/1 (issue-tracking, exploit)
Frequently asked questions
- What is CVE-2026-7578?
- CVE-2026-7578 is a medium-severity vulnerability in Maccms Pro, classified under Improper Access Control. CVSS score: 4.7/10. Published 2026-05-01.
- How severe is CVE-2026-7578?
- Medium severity. CVSS v3 base score is 4.7 out of 10.