CVE-2021-2400Network attack vector

Unauthenticated data disclosure via SAXParser XXE

Published Jul 20, 2021 · Updated Sep 26, 2024

XXE in Oracle BI Publisher 5.5.0.0.0, 11.1.1.9.0, 12.2.1.3.0, and 12.2.1.4.0 allows remote attackers to read data via HTTP. The SAXParser endpoint dereferences an external-entity URI in a crafted XML document and embeds the retrieved content into the document for further processing. The endpoint listens on TCP port 9502 by default, requires no authentication, and exposes information readable by the service account.

CVSS severity7.5
High
EPSS probability83.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in Oracle BI Publisher 5.5.0.0.0, 11.1.1.9.0, 12.2.1.3.0, and 12.2.1.4.0 allows remote attackers to read data via HTTP. The SAXParser endpoint dereferences an external-entity URI in a crafted XML document and embeds the retrieved content into the document for further processing. The endpoint listens on TCP port 9502 by default, requires no authentication, and exposes information readable by the service account.

The record

CVE
CVE-2021-2400
Published
Jul 20, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
Oracle BI Publisher
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 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
  4. Affected versionversion=5.5.0.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle BI Publisherversion=11.1.1.9.0; version=12.2.1.3.0; version=12.2.1.4.0; version=5.5.0.0.0

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5OracleCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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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