RCE in Nuxsmin Syspass
CVE-2026-65711
sysPass through version 3.2.11 contains an OS command injection vulnerability that allows authenticated administrators to execute arbitrary commands as the web server process user by setting a malicious backup path and triggering a backup. The FileBackupService builds a tar shell command via string concatenation, inserting the admin-configurable siteBackupPath setting without escapeshellarg() or equivalent sanitization before passing it to exec(), causing injected commands to persist and execute on every subsequent backup trigger.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.020 (81.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Nuxsmin Syspass — versions 0
Weakness classification (CWE)
References
- gist.github.com/sermikr0/16bcbc799dc33d39d5714db9bbcbdb77 (technical-description, exploit)
- www.vulncheck.com/advisories/syspass-authenticated-os-command-injection-via-bac… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-65711?
- CVE-2026-65711 is a high-severity vulnerability in Nuxsmin Syspass, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-07-24.
- How severe is CVE-2026-65711?
- High severity. CVSS v3 base score is 7.2 out of 10.