CVE-2021-39273 json
In XeroSecurity Sn1per 9.0 (free version), insecure permissions (0777) are set upon application execution, allowing an unprivileged user to…
published 2021-08-19 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-25635
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.7%
- EPSS 2.7% chance of exploitation in 30 days, percentile 85%
- public exploits
- 0
- none known
Summary
In XeroSecurity Sn1per 9.0 (free version), insecure permissions (0777) are set upon application execution, allowing an unprivileged user to modify the application, modules, and configuration files. This leads to arbitrary code execution with root privileges.
Exploit prediction
2.67% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/nikip72/CVE-2021-39273-CVE-2021-39274 referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/1N3/Sn1per/issues/358 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-276 Incorrect Default Permissions
References
-
github.com
/nikip72/CVE-2021-39273-CVE-2021-39274
exploit, third-party-advisory
-
github.com
/1N3/Sn1per/issues/358
exploit, third-party-advisory
-
github.com
/1N3/Sn1per/releases
release-notes, third-party-advisory
Sources
- CVE List CVE-2021-39273
- NVD CVE-2021-39273
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