CVE-2021-44278Network attack vector

Request manipulation via unencoded configuration identifiers

Published Dec 3, 2021 · Updated Aug 4, 2024

Path manipulation in LibreNMS 21.11.0 allows remote attackers to alter requests sent to a configured Oxidized service. showconfig.inc.php concatenates configuration OID and version values into Oxidized request URLs without URL encoding, allowing delimiter characters to change the query structure. The affected code runs when the Show Config view retrieves configuration content; upstream material does not demonstrate a further file-read, write, or code-execution consequence.

CVSS severity9.8
Critical
EPSS probability1.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path manipulation in LibreNMS 21.11.0 allows remote attackers to alter requests sent to a configured Oxidized service. showconfig.inc.php concatenates configuration OID and version values into Oxidized request URLs without URL encoding, allowing delimiter characters to change the query structure. The affected code runs when the Show Config view retrieves configuration content; upstream material does not demonstrate a further file-read, write, or code-execution consequence.

The record

CVE
CVE-2021-44278
Published
Dec 3, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 3, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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