SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2020-35729

KLog Server 2.4.1 allows OS command injection via shell metacharacters in the actions/authenticate.php user parameter.

EXPLOIT ×2 ✓CRITICAL 9.8EPSS 88.1%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 88.1%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.

Description

KLog Server 2.4.1 allows OS command injection via shell metacharacters in the actions/authenticate.php user parameter.

CVSS 3.1
9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
88.10% probability · 100th percentile
Public exploits
2 in Exploit-DB · verified · first 5 January 2021
CISA KEV
Not listed
Weakness
CWE-78
Affected
klogserver/klog server
Source
cve@mitre.org
EPSS trend
0%45%90%26 October 2026: 88.10%26 October 202626 October 2026

EPSS 88.1% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (2)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-49474source ↗Klog Server 2.4.1 - Unauthenticated Command Injection (Metasploit)php · Metin Yunus Kandemirwebapps25 January 2021yes
EDB-49366source ↗Klog Server 2.4.1 - Command Injection (Unauthenticated)php · B3KC4Twebapps5 January 2021yes

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.