CVE-2021-39274 json
In XeroSecurity Sn1per 9.0 (free version), insecure directory permissions (0777) are set during installation, allowing an unprivileged user…
published 2021-08-19 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-25636
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.1%
- EPSS 3.1% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
In XeroSecurity Sn1per 9.0 (free version), insecure directory permissions (0777) are set during installation, allowing an unprivileged user to modify the main application and the application configuration file. This results in arbitrary code execution with root privileges.
Exploit prediction
3.12% chance of exploitation in the next 30 days, higher than 87% 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/357 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/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/357
exploit, third-party-advisory
-
github.com
/1N3/Sn1per/releases
release-notes, third-party-advisory
Sources
- CVE List CVE-2021-39274
- NVD CVE-2021-39274
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