Auth bypass in Vestacp
CVE-2020-36948
VestaCP 0.9.8-26 contains a session token vulnerability in the LoginAs module that allows remote attackers to manipulate authentication tokens. Attackers can exploit insufficient token validation to access user accounts and perform unauthorized login requests without proper administrative permissions.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.001
Affected products
- Vestacp — versions 0.9.8-26
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49219 (exploit)
- vestacp.com/ (product)
- www.vulnerability-lab.com/get_content.php (technical-description, exploit)
- www.vulnerability-lab.com/show.php (vendor-advisory)
- www.vulncheck.com/advisories/vestacp-loginas-insufficient-session-validation (third-party-advisory)
Frequently asked questions
- What is CVE-2020-36948?
- CVE-2020-36948 is a critical-severity vulnerability in Vestacp, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2026-01-27.
- How severe is CVE-2020-36948?
- Critical severity. CVSS v3 base score is 9.8 out of 10.