CVE-2021-39377
A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the...
A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the application database. A malicious attacker can issue SQL commands to the MySQL (MariaDB) database through the index.php username parameter.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the application database. A malicious attacker can issue SQL commands to the MySQL (MariaDB) database through the index.php username parameter.
- Record
CVE-2021-39377- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-89
- Updated
- 2026-11-02
CVE List No score
A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the application database. A malicious attacker can issue SQL commands to the MySQL (MariaDB) database through the index.php username parameter.
- Record
CVE-2021-39377- Updated
- 2026-11-02
EUVDEUVD-2021-25737 No score
A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the application database. A malicious attacker can issue SQL commands to the MySQL (MariaDB) database through the index.php username parameter.
- Record
EUVD-2021-25737- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w64q-f6qr-2h2h No score
A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the...
A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the application database. A malicious attacker can issue SQL commands to the MySQL (MariaDB) database through the index.php username parameter.
- Record
GHSA-w64q-f6qr-2h2h- Weakness
- CWE-89
- Updated
- 2026-11-02
OSV
A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the application database. A malicious attacker can issue SQL commands to the MySQL (MariaDB) database through the index.php username parameter.
- Record
CVE-2021-39377- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | security-n/CVE-2021-39377 | 2021-08-18 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-39377 is a critical vulnerability (CVSS 9.8) in Os4ed Opensis, published September 1, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 3.60%, the 89th percentile. No source names a fixed version.