Auth bypass in Maccms
CVE-2026-4562
A security flaw has been discovered in MacCMS 2025.1000.4052. This affects an unknown part of the file application/api/controller/Timming.php of the component Timming API Endpoint. The manipulation results in missing authentication. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.007 (49.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.6% 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: 0.007 · change: +0.001
Affected products
- Maccms — versions 2025.1000.4052
Weakness classification (CWE)
References
- vuldb.com/ (vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- github.com/HuajiHD/CVE/issues/9 (issue-tracking, exploit)
Frequently asked questions
- What is CVE-2026-4562?
- CVE-2026-4562 is a high-severity vulnerability in Maccms, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-03-23.
- How severe is CVE-2026-4562?
- High severity. CVSS v3 base score is 7.3 out of 10.