CVE-2021-3317
KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on...
KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on the original value of the source parameter.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on the original value of the source parameter.
- Record
CVE-2021-3317- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-78
- Updated
- 2026-11-02
CVE List No score
KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on the original value of the source parameter.
- Record
CVE-2021-3317- Updated
- 2026-11-02
EUVDEUVD-2021-26648 No score
KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on the original value of the source parameter.
- Record
EUVD-2021-26648- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w7mw-3wp8-x68j
KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on...
KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on the original value of the source parameter.
- Record
GHSA-w7mw-3wp8-x68j- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-77
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Klog Server 2.4.1 - Command Injection (Authenticated) | 2021-02-01 |
| PoC in GitHub | Al1ex/CVE-2021-3317 | 2021-04-09 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-3317 is a high vulnerability (CVSS 8.8) in Klogserver Klog Server, published January 26, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 41.4%, the 98th percentile. No source names a fixed version.