Auth bypass in Sfcyazilim Sonlogger
CVE-2021-27963
SonLogger before 6.4.1 is affected by user creation with any user permissions profile (e.g., SuperAdmin). An anonymous user can send a POST request to /User/saveUser without any authentication or session header.
Vulnerability class: Broken Authentication
EPSS: 0.024 (82.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.
Affected products
- Sfcyazilim Sonlogger
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (x_refsource_MISC, Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-27963?
- CVE-2021-27963 is a high-severity vulnerability in Sfcyazilim Sonlogger, classified under Missing Authentication for Critical Function. CVSS score: 8.2/10. Published 2021-03-05.
- How severe is CVE-2021-27963?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2021-27963 known to be exploited?
- 14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.