KLog Server through 2.4.1 allows authenticated command injection.
Priority HIGH 66CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.
Summary
KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on the original value of the source parameter.
Why it matters now
EPSS 0.41394 98th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:klogserver:klog_server:*:*:*:*:*:*:*:* | up to 2.4.1 | Vulnerable | Klogserver |
- cpe:2.3:a:klogserver:klog_server:*:*:*:*:*:*:*:* Versions up to 2.4.1 Vulnerable ·Klogserver
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3317
- 2026-10-03 Alias added: GHSA-w7mw-3wp8-x68j
References
More Klogserver Klog Server vulnerabilities
- TI-2020-18188 KLog Server 2.4.1 allows OS command injection via shell metacharacters in the actions/authenticate.php user parameter. CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-3317 · CVE Program
- CVE-2021-3317 · NVD
- FIRST EPSS
- GHSA-w7mw-3wp8-x68j · GitHub Advisory Database · CC BY 4.0
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