CVE-2021-2480Network attack vector

Unauthorized data modification via Web Listener

Published Oct 20, 2021 · Updated Sep 25, 2024

An access-control vulnerability in Oracle HTTP Server 11.1.1.9.0 allows remote attackers to make unauthorized updates, inserts, or deletes via HTTP. Oracle identifies the affected locus as the Web Listener but has not disclosed the specific operation that permits unauthenticated modification. The attack requires network access and no credentials; impact is limited to integrity of data accessible through the server.

CVSS severity3.7
Low
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An access-control vulnerability in Oracle HTTP Server 11.1.1.9.0 allows remote attackers to make unauthorized updates, inserts, or deletes via HTTP. Oracle identifies the affected locus as the Web Listener but has not disclosed the specific operation that permits unauthenticated modification. The attack requires network access and no credentials; impact is limited to integrity of data accessible through the server.

The record

CVE
CVE-2021-2480
Published
Oct 20, 2021
Updated
Sep 25, 2024
Vendor
Oracle Corporation
Product
Oracle HTTP Server
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.1.1.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle HTTP Serverversion=11.1.1.9.0

Published CVSS scores

3.7Oracle CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N

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

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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