CVE-2021-2315Network attack vector

Unauthenticated data disclosure and modification

Published Apr 22, 2021 · Updated Sep 26, 2024

A Web Listener flaw in Oracle HTTP Server 11.1.1.9.0, 12.2.1.3.0, and 12.2.1.4.0 allows remote attackers to read or alter data via HTTP. Oracle has not published the flawed Web Listener operation or the input that reaches it. Exploitation requires no authentication but depends on interaction by a person other than the attacker; impact is limited to some server-accessible data.

CVSS severity5.4
Medium
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A Web Listener flaw in Oracle HTTP Server 11.1.1.9.0, 12.2.1.3.0, and 12.2.1.4.0 allows remote attackers to read or alter data via HTTP. Oracle has not published the flawed Web Listener operation or the input that reaches it. Exploitation requires no authentication but depends on interaction by a person other than the attacker; impact is limited to some server-accessible data.

The record

CVE
CVE-2021-2315
Published
Apr 22, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
Oracle HTTP Server
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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
  2. Affected versionversion=12.2.1.3.0
  3. Affected versionversion=12.2.1.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle HTTP Serverversion=11.1.1.9.0; version=12.2.1.3.0; version=12.2.1.4.0

Published CVSS scores

5.4OracleCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
5.8NIST NVDAV:N/AC:M/Au:N/C:P/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

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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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