CVE-2021-44094Public exploit

Remote code execution via unverified plugin download

Published Nov 28, 2021 · Updated Aug 4, 2024

Remote code execution in ZrLog 2.2.2 allows man-in-the-middle attackers to run a malicious JAR during a plugin download. The plugin download flow accepts a modified host parameter, retrieves the referenced JAR, and executes malicious code placed in its startup class. Exploitation requires interception and modification of a plugin download, after which the injected code runs in the ZrLog application process.

CVSS severity7.8
High
EPSS probability1.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in ZrLog 2.2.2 allows man-in-the-middle attackers to run a malicious JAR during a plugin download. The plugin download flow accepts a modified host parameter, retrieves the referenced JAR, and executes malicious code placed in its startup class. Exploitation requires interception and modification of a plugin download, after which the injected code runs in the ZrLog application process.

The record

CVE
CVE-2021-44094
Published
Nov 28, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1105
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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